Certain mods (that i know are B27 compatible) keep making CC crash after round 2 of campaign ends.
I really want to put more mods on, but a lot of the mods i have tried do this.
What do?

Also what does the I.O symbol mean in the Mod Release forum?

1.0 means that it's compatible with version....you guessed it, 1.0! The one that came after b27.

Now before I start, this is the wrong place man, we've got a subforum for all the problems you run into. This is of topic, where we discuss things that have literally nothing to do with the game.

That said, you've run into a strange glitch, tried reinstalling the game yet? And an update to 1.0 wouldn't hurt either.