A few people have reported issues with Firefox 9.0.1 not working with some database features with the main problem being that you can’t download the summitslist.csv file. This is about 6Mb in size and the symptom is only a few kb are downloaded.
I’ve checked and here are my results
Windows XP Pro (32), Firefox 9.0.1, works
Windows 7 Pro (32), Firefox 9.0.1, works
Windows 7 Pro (64), Firefox 9.0.1, works
Linux (Debian 6 32), Firefox 9.0.1, works
Linux (RedHat 5 64), Firefox 9.0.1, works
I can’t test OS X as I don’t have any Apple kit. One of the reported problems was with OS X 10.7 so I’m not sure if this is a common problem on OS X or if there are people having issues with Firefox 9.0.1 using Windows or Linux.
In all the above cases I visited getfirefox.com and clicked the download icon for the right version of 9.0.1 for the OS the machine ran. Machines were using Core 2 Duo (XP, RedHat 5), Core i7 (W7 64), Xeon X5460 (W7 32) or Pentium 4 M (Debian 6).