Somethign else is going on here. I see that you uploaded and I see that someone after you uploaded so certainly it worked for the both of you. However, when I try it with IE 8.0 or the latest FireFox it simply doesn't work for me. The progress bar goes across for the first file. Then if I try a second file the progress bar goes acros for it, but it only says 1 file uploaded. I hit submit and nothing shows up on the site. So then I tried doing just 1 file. The progress bar shows it uploading then it says complete, then I put in a description and title and click submit and I'm instantly returned to that gallery (was using the Calendar submissions just like you did) and no photo is there.
My "guess' is 1 of 2 things is wrong:
1) Something screwy with the version of Flash installed on my PC, although I thought I had the latest.
2) Something screwy with my account.
I will try logging on as another user and see if I can rule out #2.