Version:           2.2.8 (using KDE 3.5.10)
Compiler:          gcc 4.1.2 
OS:                Linux
Installed from:    Gentoo Packages

When I leave KTorrent 2.2.8 running for some days, its log files get full and
get rotated. Unfortunately sometimes a KDE dialog appears asking whether to
overwrite "log-1" with "log" (if I remember it correctly). Anyway, without user
interaction (leaving the dialog open), KTorrent appears to start to consume
large amounts of memory, which could render the machine unresponsive. Tracing
the source code lead me to a part in libktorrent/util/autorotatelogjob.cpp
which appears to try to move a file twice, resulting in a race:

if (cnt == 1)
{
        // move current log to 1 and zip it
    bt::Move(file,file + "-1",true);
    KIO::Job* sj =
KIO::file_move(KURL::fromPathOrURL(file),KURL::fromPathOrURL(file +
"-1"),-1,true,false,false);
    connect(sj,SIGNAL(result(KIO::Job*)),this,SLOT(moveJobDone(KIO::Job* )));
}

Originally reported at http://ktorrent.org/forum/viewtopic.php?t=2816 and https://bugs.gentoo.org/show_bug.cgi?id=255068#add_comment and now this got directed here.