Checksum Mismatch while trying to load...

In other words, I get kicked when trying to load this, or a few other wads during a netgame. Then it gives me this error in the console, what does it mean?

Shouldn't the color value in a wad be a number, not a text value?

A user wanted me to remove the name, so just consider all of that the wad name.

Oh, jeez, that's BBCode. I thought it was in a WAD.

Your version of the .WAD is different from the host's version, thus, the game bails out. Nothing special.

I'm the only person in my server, and it still kicks me.

Is the WAD in a subdirectory, by any chance? I've seen that rarely cause a problem or two.

No, its actually in the same folder as Srb2.

Once, when I was about to submit a map for a contest, I had opened a server just to do a final test.

I added the wad => Crash! I almost panicked.

I got to fix it after I checked the level header, I don't remember what, but I had mistyped something or added something not supported.

A question: I'm thinking of adding "Author" in file properties, you know: Right click on a file > Properties > Summary > Author. Can this cause conflict between who has got an older version of my wad and the version with edited properties upon joining my servers?