Bug#374584: fixed

[Nato Welch <nato@debbugs.r30.net>]

The above patch by michael@pitsco.com does fix the problem for me 
(although I had to expire the page caches for all affected nodes). the 
use of $chunk (which appears nowhere else in the function's scope) 
instead or $text in the preg_replace filter effectively erases the text 
the function is passed. 

This appears to be fixed already in the 4.5.8 tarball from upstream. cvs 
uses a totally different $chunk operation. Perhaps it was a botched 
backport?

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Nato Welch
nate@asaim.com