I also have this same issue.
I am running on Windows 2003 SP2, IIS 6, PHP 5.2.5, MySQL 5.0.45, WordPress 2.3.1.
Previously the upload and browse functionality worked fine with WordPress 2.0.2, since updating to 2.3.1 these functions do not work as mentioned in the post above.
I have tried reinstalling my web infrastructure noted above (with the latest versions) and setup a new plain vanila WordPress site. This unfortunately has made no difference to the issue.
I have carefully checked all permissions for the website including permissions on uploaded files and I’m reasonably confident that I have no issue in that area.
I have tried using both Firefox 2.0.0.9 and Internet Explorer 7, both browsers produced the same result.
I have also tried the fix mentioned in this thread https://www.ads-software.com/support/topic/95518. This unfortunately didn’t resolve the issue either.
I am now fresh out of ideas as to where to go with this. My gut feeling is an issue with my PHP or MySQL configuration. Perhaps the ‘Browse All’ feature is calling one of the extra php funtions that I haven’t enabled? Perhaps MySQL is doing something funny like was indicated in the liked article?
Anyway I would really appreciate some help, thankyou in advance.
– Eluthria