IDEA6 freezes after pasting some text

IDEA6.0 just froze, after I pasted some content into a textfile via IDEA

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oh wait.... it just awoke again.... let me look....

Hmm, I suspect .... but that is only me suspecting... that IDEA spent some really long time (>1 minute) analyzing how my textfile has changed.

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or is this maybe something that might be fixed in 6.0.1 (currently I am downloading this)?
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I can paste the two files into here if you want (but it is 20.000 lines) - or give me an email then I mail it