Ok, regarding my download problem:
I contacted my host's who worked away at it for some hours... I have received the following in anyone can throw some light onto a fix?
*"I can confirm that download works perfectly in Safari, but not at all in Firefox.
Hence, not a PHP5.3 issue - the error is browser side, not server side. On the server, all works but the code is incorrect for some browsers. Firefox doesn't like it at all, Safari just downloaded the file without any issues to my folder. As a general rule, PHP5.3 issues will stop a page from working in 100% of cases (no exceptions); a server side issue also should affect all browsers equally as the error is on the server before sending the page; but an error that affects browsers differently indicates an issue in how the code is constructed that is sent to the browser (HTML/JS). Given that your code is quite short, could just be an issue with how the HEADER is constructed within uploads.php (last few lines in the file). "*