User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:22.214.171.124pre) Gecko/20100128 Ubuntu/10.04 (lucid) Firefox/3.6pre Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.3a1pre) Gecko/20100128 Ubuntu/10.04 (lucid) Minefield/3.7a1pre Let's say I have an image: http://blah.com/blah.jpg If I load that image in its own tab, it may render and then suddenly disappear into the white background. I don't know how to trigger this on command. Reproducible: Sometimes
Please give a URL, and also try safe-mode / new profile, for maybe this is caused by an add-on or by a profile corruption or by a setting. http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes http://support.mozilla.com/en-US/kb/Basic+Troubleshooting#Make_a_new_profile
Giving you a specific URL wouldn't be very helpful. It occurs randomly with all image types. It doesn't occur in Firefox 3.6 though.
Marking this as INCOMPLETE since there isn't enough information here to reproduce the bug. Please feel free to re-open if you're still running into this issue.