Re: Possible way to upload image to post
BMP is not an allowed mime by default because they tend to be huge and uncompressed. You can force it to be allowed though by adding it to the mime (and extension types).
This bug bothers me though, if you can give me steps to reproduce it that would be very helpful:
[png] Error_Occurred_While_Processing_Request.png (17.7 KB, 0 downloads) [x]
Did it happen when you uploaded a PNG and a BMP at the same time?