As a webdebdesigner i developped a cms system to upload images with php to a mysql database. Firefox version 5.0.1 for MAC and earlier have no problems with uploading through the script. But after that version it is impossible to upload images bigger then 250kb. The page where the customer chooses his image for upload stalls and the form is not sent to the actual upload script, which should validate and process the image. This problem only occurs in Firefox, all other browsers work just fine! On top of that: Giving feedback to firefox not possible for MAC.