IDLE error on 3.0.1

[John Forse]

Occaisionally, if I mistype in python shell or try to copy & paste a  
line there, I get a permanent hang with the error below. It isn't  
corrected by quitting IDLE, but is put right with a restart.  I am  
running 3.0.1 on Mac 10.5.6. Is this a bug, as it never happened on  
the same system with 2.5 &2.6.1 ?
Is there another way to prevent this?
Regards
John Forse

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