media-upload.php blank screen when inserting images

Hi there,

I’m not quite a noob when it’s about computers and WordPress, but this new flash-image feature is driving me (as others) totally creasy. WordPress really should have tested this better before releasing 2.5.
Because I can’t find the solution on this issue I hope there’s someone to help.

I am running Windows XP SP2, Ubuntu 8.04LTS and Vista SP1. With either IE7, Opera and FireFox.
After selecting an image from the gallery and insert it in my post the input screen turns blank, it stays that way with Opera and FireFox, IE7 is giving me an access denied on row 3 in media-upload.php.
I’ve done everything Otto42 has suggested. Deactivated all my plug-inn’s, installed no-flash-upload.php. Nothing does the trick…

Does anyone has any suggestions?

Thank you!