The #1 reason that users can't upload photos to the photo gallery is the size of the file. With modern 8+ megapixel camera, each file can come out at 5 MB or larger. Our server can't handle that right now, so there is a soft-limit of about 1.5 MB per file that more or less will stop the upload from being successful if you go over that size.

You can get any number of free software packages to resize your photos. Most cameras come with some type of tool to do this, you can also get Google Picassa to resize and output your photos into a single directory that you can upload too.