AWdeV and Blead: After the so called syntax errors, when you refresh the page, are the pictures you attempted to upload showing up?
If not, you could try to clear out your cookies for tw.greywool.com and try again. This would remove the pictures you've uploaded so far from the list on the page when you load it though.
If yes, can you let me know of the contents of said cookies? And the filename of the file you've attempted to upload? And the format? Is the image actually the format the extension attempts to claim? What browser (and version) are you using?
Also feel free to show up on IRC for more thorough troubleshooting. Preferrably when I'm not passed out.