open the following testcase attachments on separate tabs : 1st tab :- http://bugzilla.mozilla.org/attachment.cgi?id=19005&action=view 2nd Tab :- http://bugzilla.mozilla.org/attachment.cgi?id=84090&action=view 3rd tab :- any url 1. go to the 1st tab with testcase attachment 19005 [details] 2. click on the change button, the background opacity changes as desired 3. go to the 2nd tab with testcase attachment 84090 [details] 4. the foregroung color of the large text has the desired 50% opacity. 5. go back to the 1st tab ..... actual : the text with the lighter opacity , has a larger font size and also the color of the text has changed 6. switch between different tabs 7. then go to the tab with attachment 84090 [details] actual: u will notice teh size of the text which has the -moz-opacity style set, has reduced in size. And at differnt occassions, the color of the text also changes to 'yellow' note: to reproduce this , u might have to do a combination of switching between various tabs on the same window, or even switching between windows. I have been able to reproduce this every time on my winXP machine with the 2003-03-31-04trunk build. Do not see this on linux.

->Gfx:Win.

This bug has been buried in the graveyard and has not been updated in over 5 years. It is probably safe to assume that it will never be fixed, so resolving as WONTFIX. [Mass-change filter: graveyard-wontfix-2014-09-24]