I just ran my "standard" test of the Drag-and-Drop uploader. I like that one because it's great for bulk upload.
I took the set of 33 - 995,308 byte test pics and drag them into the uploader (that's about the 32MB limit) and uploaded them in about 12 minutes. The whole group of 33 (test01 - test33.jpg) is in my Image library....no problems. I uploaded them to my "Active" folder, and they are indeed in that Folder (no loses).
Can you tell me which uploader you are using and specifics on picture size?