Reloaded Bug 1013024. Got an unstyled page, even on repeated reloads. Can repro by loading the page by URL bar, enter, then hitting Reload. Console log: GET https://bugzilla.mozilla.org/show_bug.cgi [HTTP/1.1 200 OK 1570ms] Use of getUserData() or setUserData() is deprecated. Use WeakMap or element.dataset instead. requestNotifier.js:64 GET https://bugzilla.mozilla.org/data/assets/822b2dcc56b051cbfc09bb7115d4085e.css [HTTP/1.1 304 Not Modified 92ms] GET https://bugzilla.mozilla.org/data/assets/64dbf971db4d30e01c4bcf252aadc27d.css [HTTP/1.1 304 Not Modified 175ms] GET https://bugzilla.mozilla.org/js/yui/yahoo-dom-event/yahoo-dom-event.js [HTTP/1.1 304 Not Modified 176ms] GET https://bugzilla.mozilla.org/js/yui/cookie/cookie-min.js [HTTP/1.1 304 Not Modified 177ms] GET https://bugzilla.mozilla.org/js/yui/datasource/datasource-min.js [HTTP/1.1 304 Not Modified 177ms] GET https://bugzilla.mozilla.org/js/yui/connection/connection-min.js [HTTP/1.1 304 Not Modified 235ms] GET https://bugzilla.mozilla.org/js/yui/json/json-min.js [HTTP/1.1 304 Not Modified 236ms] GET https://bugzilla.mozilla.org/js/yui/autocomplete/autocomplete-min.js [HTTP/1.1 304 Not Modified 237ms] GET https://bugzilla.mozilla.org/js/yui/calendar/calendar-min.js [HTTP/1.1 304 Not Modified 238ms] GET https://bugzilla.mozilla.org/js/yui/container/container-min.js [HTTP/1.1 304 Not Modified 291ms] GET https://bugzilla.mozilla.org/js/yui/menu/menu-min.js [HTTP/1.1 304 Not Modified 292ms] GET https://bugzilla.mozilla.org/js/global.js [HTTP/1.1 304 Not Modified 293ms] GET https://bugzilla.mozilla.org/js/util.js [HTTP/1.1 304 Not Modified 295ms] GET https://bugzilla.mozilla.org/js/field.js [HTTP/1.1 304 Not Modified 351ms] GET https://bugzilla.mozilla.org/js/comment-tagging.js [HTTP/1.1 304 Not Modified 352ms] GET https://bugzilla.mozilla.org/extensions/BMO/web/js/edit_bug.js [HTTP/1.1 304 Not Modified 353ms] GET https://bugzilla.mozilla.org/extensions/InlineHistory/web/inline-history.js [HTTP/1.1 304 Not Modified 366ms] GET https://bugzilla.mozilla.org/extensions/TrackingFlags/web/js/tracking_flags.js [HTTP/1.1 304 Not Modified 367ms] GET https://bugzilla.mozilla.org/extensions/BMO/web/js/edituser_menu.js [HTTP/1.1 304 Not Modified 367ms] GET https://bugzilla.mozilla.org/skins/contrib/Mozilla/tabzilla.png [HTTP/1.1 304 Not Modified 553ms] GET https://bugzilla.mozilla.org/js/flag.js [HTTP/1.1 304 Not Modified 368ms] GET https://bugzilla.mozilla.org/js/comments.js [HTTP/1.1 304 Not Modified 486ms] GET https://bugzilla.mozilla.org/js/yui/cookie/cookie-min.js [HTTP/1.1 304 Not Modified 374ms] GET https://bugzilla.mozilla.org/js/yui/datasource/datasource-min.js [HTTP/1.1 304 Not Modified 64ms] GET https://bugzilla.mozilla.org/js/yui/connection/connection-min.js [HTTP/1.1 304 Not Modified 62ms] GET https://bugzilla.mozilla.org/js/yui/json/json-min.js [HTTP/1.1 304 Not Modified 61ms] GET https://bugzilla.mozilla.org/js/yui/autocomplete/autocomplete-min.js [HTTP/1.1 304 Not Modified 62ms] GET https://bugzilla.mozilla.org/js/yui/calendar/calendar-min.js [HTTP/1.1 304 Not Modified 62ms] GET https://bugzilla.mozilla.org/js/yui/container/container-min.js [HTTP/1.1 304 Not Modified 63ms] GET https://bugzilla.mozilla.org/js/yui/menu/menu-min.js [HTTP/1.1 304 Not Modified 62ms] GET https://bugzilla.mozilla.org/js/global.js [HTTP/1.1 304 Not Modified 63ms] ReferenceError: YAHOO is not defined show_bug.cgi:61 GET https://bugzilla.mozilla.org/js/util.js [HTTP/1.1 304 Not Modified 61ms] GET https://bugzilla.mozilla.org/js/field.js [HTTP/1.1 304 Not Modified 63ms] GET https://bugzilla.mozilla.org/js/comment-tagging.js [HTTP/1.1 304 Not Modified 61ms] GET https://bugzilla.mozilla.org/extensions/BMO/web/js/edit_bug.js [HTTP/1.1 304 Not Modified 62ms] GET https://bugzilla.mozilla.org/extensions/InlineHistory/web/inline-history.js [HTTP/1.1 304 Not Modified 59ms] GET https://bugzilla.mozilla.org/extensions/TrackingFlags/web/js/tracking_flags.js [HTTP/1.1 304 Not Modified 63ms] GET https://bugzilla.mozilla.org/extensions/BMO/web/js/edituser_menu.js [HTTP/1.1 304 Not Modified 63ms] GET https://bugzilla.mozilla.org/skins/contrib/Mozilla/tabzilla.png [HTTP/1.1 304 Not Modified 71ms] ReferenceError: YAHOO is not defined show_bug.cgi:246 ReferenceError: hideAliasAndSummary is not defined show_bug.cgi:403 ReferenceError: YAHOO is not defined show_bug.cgi:450 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:1071 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:1134 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:1316 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:1464 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:1730 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:1797 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:1860 ReferenceError: YAHOO is not defined show_bug.cgi:1864 ReferenceError: YAHOO is not defined show_bug.cgi:2018 ReferenceError: hideEditableField is not defined show_bug.cgi:2029 ReferenceError: YAHOO is not defined show_bug.cgi:2066 ReferenceError: hideEditableField is not defined show_bug.cgi:2077 ReferenceError: assignToDefaultOnChange is not defined show_bug.cgi:2093 ReferenceError: hideEditableField is not defined show_bug.cgi:2126 ReferenceError: hideEditableField is not defined show_bug.cgi:2190 ReferenceError: hideEditableField is not defined show_bug.cgi:2223 ReferenceError: YAHOO is not defined show_bug.cgi:2305 ReferenceError: hideEditableField is not defined show_bug.cgi:2325 GET https://bugzilla.mozilla.org/js/flag.js [HTTP/1.1 304 Not Modified 122ms] ReferenceError: YAHOO is not defined show_bug.cgi:2412 ReferenceError: YAHOO is not defined show_bug.cgi:2449 ReferenceError: YAHOO is not defined show_bug.cgi:2510 ReferenceError: YAHOO is not defined show_bug.cgi:2573 ReferenceError: YAHOO is not defined show_bug.cgi:2590 ReferenceError: setupEditLink is not defined show_bug.cgi:2629 ReferenceError: hideEditableField is not defined show_bug.cgi:2662 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2725 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2756 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2790 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2810 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2844 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2864 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2898 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2918 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2952 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:2972 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3008 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3028 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3062 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3096 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3116 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3150 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3170 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3204 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3238 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3272 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3306 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3326 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3346 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3366 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3404 ReferenceError: TrackingFlags is not defined show_bug.cgi:3412 ReferenceError: hide_tracking_flags is not defined show_bug.cgi:3443 ReferenceError: createCalendar is not defined show_bug.cgi:3516 ReferenceError: YAHOO is not defined show_bug.cgi:3903 ReferenceError: YAHOO is not defined show_bug.cgi:3923 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:3980 ReferenceError: initHidingOptionsForIE is not defined show_bug.cgi:4040 ReferenceError: YAHOO is not defined show_bug.cgi:4063 GET https://bugzilla.mozilla.org/js/comments.js [HTTP/1.1 304 Not Modified 60ms] ReferenceError: addCollapseLink is not defined show_bug.cgi:4199 GET https://secure.gravatar.com/avatar/1c8eabcbb66baee4a8f88c9186b60b12 [HTTP/1.1 304 Not Modified 100ms] ReferenceError: addCollapseLink is not defined show_bug.cgi:4257 ReferenceError: addCollapseLink is not defined show_bug.cgi:4305 ReferenceError: addCollapseLink is not defined show_bug.cgi:4359 ReferenceError: addCollapseLink is not defined show_bug.cgi:4413 ReferenceError: addCollapseLink is not defined show_bug.cgi:4464 ReferenceError: addCollapseLink is not defined show_bug.cgi:4512 ReferenceError: addCollapseLink is not defined show_bug.cgi:4578 ReferenceError: addCollapseLink is not defined show_bug.cgi:4629 ReferenceError: addCollapseLink is not defined show_bug.cgi:4687 ReferenceError: addCollapseLink is not defined show_bug.cgi:4744 ReferenceError: addCollapseLink is not defined show_bug.cgi:4795 ReferenceError: addCollapseLink is not defined show_bug.cgi:4846 ReferenceError: addCollapseLink is not defined show_bug.cgi:4892 ReferenceError: addCollapseLink is not defined show_bug.cgi:4940 ReferenceError: addCollapseLink is not defined show_bug.cgi:4988 ReferenceError: addCollapseLink is not defined show_bug.cgi:5036 ReferenceError: addCollapseLink is not defined show_bug.cgi:5084 ReferenceError: inline_history is not defined show_bug.cgi:5868 ReferenceError: YAHOO is not defined show_bug.cgi:5909 GET https://secure.gravatar.com/avatar/390a2d7c539a05a1bf9d3d1b2ccb2e5a [HTTP/1.1 304 Not Modified 104ms] GET https://secure.gravatar.com/avatar/4bcc1646956acd3ee25234b34da91414 [HTTP/1.1 200 OK 195ms] GET https://xcomet05.todoist.com/comet/1401492679326/ GET https://xcomet05.todoist.com/comet/1401492679331/

this is most likely fallout from a bug in nightly's new cache code (in your case neither css or js assets were loaded).