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If you're seeing an error similar to:

(?:(?<=[\s,]))* matches null string many times in regex; marked by <-- HERE in 
m/\G(?:(?<=[\s,]))* <-- HERE \Z/ at 
/opt/local/lib/perl5/5.8.7/Text/Wrap.pm line 46.

This issue is popping up more and more on the users list and in irc. The short version is that newer versions of Text::Wrap (not associated with SpamAssassin) throw this warning for a regular expression that has been in use for years. It's been reported as a bug to the Text::Wrap authors already.

3.1.8 and 3.2 and beyond have a work-around to avoid displaying the warning from Text::Wrap. Alternately, you can downgrade your installation of Text::Wrap to an earlier version which doesn't have this issue.

This issue was originally reported in SpamAssassin Bugzilla ticket 5056:

http://issues.apache.org/SpamAssassin/show_bug.cgi?id=5056

For a discussion about downgrading Text::Wrap, please see the following thread:

http://www.mail-archive.com/users@spamassassin.apache.org/msg34628.html

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