tayreed on "Background Not Appearing.. Help!"

Hi there,
My wordpress.com site (with Modularity Lite theme) was working perfectly until this morning when I noticed that the background I had uploaded and been using was gone. When I'd access my site I'd just see the generic black background instead of my picture. Under the "Appearance" -> "Background" tab it appears to all be normal. The picture is there and uploaded. I tried removing it and replacing it with different pictures but nothing will show up. I tried it under different themes but under no circumstances am I getting background images to appear. I can change the color of the background, but that's it.. I haven't messed with the CSS at all. Please help me out if you have any ideas.. this has been quite the hassle.. :)
Thanks!
Taylor