What sizes are you using to upload your pics, Im resizing mine to 15x10cm sometimes it works sometimes its too big and very random, for instance:
I resized a pic to 10x15 file size 804k which it lets me upload and it says is 46.8k
I do a 10x15 100% crop of the original and the file size is 113k, try to upload that and it says file is too big???
Any ideas what Im doing wrong?