738 bytes, text/html
The URL is not available. I'll create a testcase based on the comments and attach that. If the reporter can attach the original page as a testcase (or a subset that shows the problem) that would help too.
Created attachment 8362 [details] Testcase: DIV is hidden and shown via visibility. Seems to work fine.
Though I cannot get to the testcase, I was able to create a testcase from the excellent description of the problem. This is working fine in a build from today. Marking WORKSFORME. Please reopen if the original URL still exhibits the problem - and if possible attach the page as a testcase.
Adding 'verifyme' keyword
Works for me: Platform: PC OS: Windows 98 Mozilla Build: 2000101014 M18 Trunk Build Marking as Verified.