Thanks for the response. You're correct... I recently figured it out..
Update here too, it was definitely file size. I put a few 6mb size files through a file cruncher and they post up just fine. The cruncher reduced the files down to about half size.
Now to figure out what changed on my device and when. I know it's directly related to resolution, but I haven't changed any settings in a long time.
For what I usually do with pics, I don't see any noticeable difference in the 6.88mb file and the 3.44mb file, other than onscreen size.
it's all good. Mystery solved for now. Thanks again for the input.