Originally Posted by 2v

Glitch. 255 is the largest decimal number recognized by hexadecimal, which is what a computer reads. 64 represents 100 and FF represents 255. This is recognized in byte form.

When extending that to two bytes (your case, because no one on the site has a capacity over 65,535 messages) 65,535 is the maximum. It's the equivalent of 255 in One Byte capacity.

In other words, your inbox is reading as Full, in Decimal form, and is fucked up. Have you switched to Firefox?