User Agent: Mozilla/5.0 (Windows NT 6.1; rv:8.0a1) Gecko/20110721 Firefox/8.0a1 Build ID: 20110721065410 Steps to reproduce: With the default theme active and tabs on top, put the sync button in the tab bar. Now do a sync. Actual results: Sync button changes to back-button while syncing.

Which platform are you on? I can't reproduce this on OSX.

Confirmed on Windows 7. Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0a1) Gecko/20110722 Firefox/8.0a1 ID:20110722030827

Should this block Firefox 8?

Temporary patch until an inverted sync throbber is made.

Comment on attachment 550238 [details] [diff] [review] Patch for 673164 v1 Doesn't http://mxr.mozilla.org/mozilla-central/source/browser/themes/winstripe/browser/browser.css#673 need to be updated as well?

Please note that this issue doesn't happen with dark personas

(In reply to comment #5) > Comment on attachment 550238 [details] [diff] [review] [diff] [details] [review] > Patch for 673164 v1 > > Doesn't > http://mxr.mozilla.org/mozilla-central/source/browser/themes/winstripe/ > browser/browser.css#673 need to be updated as well? I don't think it is necessary because it is already specified on line 1117 http://mxr.mozilla.org/mozilla-central/source/browser/themes/winstripe/browser/browser.css#1117, but I can go ahead and make that change and upload another patch if you would like.

Addressed comments by Dão.

Comment on attachment 550429 [details] [diff] [review] Patch for 673164 v2 Looks good, thanks!