I've tried all the different suggestions you've mentioned, Tricia, and nothing's making a difference. I'm at a loss...
ETA: I just tried changing my avatar too, and that's not working, either. I really don't understand what's going on. 
ETA #2: I just also tried to add cat pages, and the photos aren't uploading for those, either -- although I was able to create an album and the photos uploaded for that. I'm Totally confused now. 
I'm sorry to be such a pest, Tricia - but I really don't understand what's going on. 

I've just edited your post to add this picture, and it worked. I also can't see anything wrong with your settings. I'll see if I can add your signature banner to your Community Profile. If it works, either you aren't uploading the photos right or something about your browser is causing problems.
Okay, I've put your old siggy banner in your Community Profile with no trouble at all. Are you using AdBlock Plus and/or No Script browser add-ons? If you are, disable them temporarily and see if you can upload. You may have to "allow" TCS on both those add-ons in order to upload. That's a reach, but I don't know what else to tell you.