As far as I can make out by googling, this message is emitted by 5.00404 (don't know about older/newer versions, except that it's not in perldiag for 5.8.5)

edit: that still means you should probably upgrade the perl on the server (or install a newer version next to it)

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^2: Strange regular expression warning by Joost
in thread Strange regular expression warning by LeeC79

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