[racket] DrRacket 5.3 [3m] hangs for a while when closing tab with open file

From: Erik Dominikus (erik.dominikus71 at gmail.com)
Date: Wed Aug 15 23:51:59 EDT 2012

On my machine, DrRacket 5.3 [3m] (built from source package) looks like
waiting for something for about 5-10 seconds when closing a tab that has
a file open in it. It did not happen on Racket 5.2 [3m].

My machine's uname -a:

Linux kire 2.6.32-41-generic #91-Ubuntu SMP Wed Jun 13 11:43:55 UTC 2012
x86_64 GNU/Linux

(FYI, if a reply is needed, expect it to be late as I'll be on holiday
until Aug 27.) 

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