I get this js error when loading the above data url in a new tab. Security Error: Content at moz-nullprincipal:{49ac1ef3-c8eb-4c03-8eef-2700c60ae789} may not load or link to chrome://global/content/bindings/scrollbar.xml#scrollbar-base. This regressed between 2006-05-01 and 2006-05-03, I think because of bug 334407. Also notice this url: http://simon.incutio.com/archive/2003/08/11/selfContained When opening that data url in a new tab, you should also see a textarea in the page, but that doesn't happen anymore with current trunk builds. I think I also experience an (unreproducable) crash related to this. Talkback ID: TB18391945Q nsCOMArray_base::InsertObjectAt nsDocument::~nsDocument DOMGCCallback js_ForceGC nsAppShell::Run nsAppStartup::Run MSVCR80.dll + 0x8a21 (0x60218a21)

Mine. I need to either reorder the logic here some or just try to redo this whole function in terms of protocol flags.

Is this related to the lack of scrollbars in suite's composer?

Possible. Does the patch in bug 337260 fix that?

Seems to, thanks.

Fixed by checkin for bug 337260