Known Issues: Updated August 6, 2015

There are also safe ways to convert a int to a string and vice versa. It's only managed badly if you don't know how to do so.
Not to mention that the max meso limit is a signed 32-bit integer, making it unsigned would make it 2^32 -1 or 4,294,967,295.

As simple as itoa(), yes, I'm aware.

I thought about making it unsigned. I haven't seen MapleStory's code, and I know this is a pretty elementary mistake, but I was hesitant to suggest making it unsigned in case Nexon has anything decrementing an integer without doing a less-than-zero check.