Software caused connection abort (RT 3.8.1rc5)


I get a lot of these:

Aug 17 00:51:35 rt3 RT: Apache2::RequestIO::rflush: (53) Software
caused connection abort at /usr/local/lib/perl5/site_perl/5.8.8/HTML/
Mason/ line 1020 (/usr/local/rt38/bin/

This is my test-box - I checked and I already get them with the
currently running RT3.6.3 on the production-system.
It’s not someone clicking the Cancel-button in his browser (as Ruslan
suggest in a mail from 2006) - it appears way too often in the logs
for that.

What else could these mean?