Our website uses the superfish jQuery plug-in for our menus (http://users.tpg.com.au/j_birch/plugins/superfish/), and they work fine in Firefox, IE6, IE7, Safari, Chrome, etc. ... and even in MOST IE8 installations. The problem is, in some IE8 installations, the menus don't work (they highlight on mouseover but don't drop-down the menu).
This has me baffled. In addition to a couple customer complaints, I've got one (Windows XP) machine in-house that reproduces the issue. However, I also have another Win XP/IE8 machine in-house which doesn't experience the problem. I'm used to dealing with JS/CSS issues between different browsers, but this issue between two machines on the exact same OS and browser is a bit much.
Oh, and just to further obfuscate the matter, the machine that is reproducing the issue shows no errors, Javascript or otherwise (even when I go in to developer mode). So ... does anyone have any suggestions on what could be going on?
As far as I know neither of my two "test" machines have any special plug-ins or anything which would cause the problem, they're identical in terms of everything that matters, and there's no JS error occurring that I can check the stacktrace of or anything. But this isn't just some crazy problem that's unique to my test machine, because as I said some customers have reported it too.
Any help would be appreciated.
This issue wound up going away without us ever figuring out what caused it, so now even if we did want to figure it out we can't (as we can't replicate). Therefore I can't really mark any of the above answers as correct, but since they exist I can't delete this issue either. So, I guess the best I can do is file this answer, but it's a rather unsatisfying one; sorry.