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Radiant runs well, however every time I go to save my map it crashes. (program not responding, end now? typical stuff) I've tried creating a new map and saving with the same issue. Any idea what it could be (droffy...)

Sorry no idea.

Try reinstall and remove mods, etc.

damn, i've removed all mods and reinstalled radiant.

Post on the official IW Forums, there are many mappers there, someone is bound to have seen the problem.

Well, If u run windows Vista, I have had that problem. Try right-clicking the icon, properties, and go to the tabs. Click "compatibility" go down, and click "run as administrator" also, go to settings for all users and to the same thing. =)

Problem has already been solved, thanks for helping though.

The solution was reformatting, and so far as I know, that is the only solution. Probably some internal registry problem or something.