I have been having the same problem! I noticed it starting last week and it's been driving me nuts.
When I click to expand the "advanced settings" tab it will open for about 2 seconds and then close back up. I have noticed this problem only in IE 7 and a standalone version of IE 6 that I have running on my computer. FireFox works fine. I'm using windows XP. I do have McAfee installed, but these buttons were working fine for months before they suddenly decided to stop working.
I happened to install a few modules the day I noticed the problem, but that might just be a coincidence. I have read about his problem in other threads on this forum but no one seems to have found a way to fix it.
If anyone could help shed some light on the solution I would greatly appreciate it.
Thanks!