Re: Image uploading
I've found that when doing bulk uploading (from the filesystem) and you get a blank page on upgrade.php, most of the time there should be an error generated.
Chances are you have a filetype not allowed, a file exceeds the permitted dimensions (file size or HxW) OR, as indicated by the program, maybe you tried to add too many and just bulk upload fewer images. But if you almost immediately go to the blank page after hitting submit, chances are you have a file that exceeds the limits you've set. If you check in the <webroot>/gallery/files/# (# being your user #) directory, the file SHOULD be there but a database entry was never created.
The above assumes that you're doing a bulk upload and I'm not a support person, just another user who experienced the exact same issues. If this is happening on a single upload from your PC...I'll leave it to the experts.