Comment 4 for bug 84721

I usually use Firefox as browser, so I find unexpectedly this problem yesterday. However, if I click on Open in a new window or Open in a new tab, Konqueror works correctly.
I have tried to obtain a backtrace stopping Konqueror after the problem. I don't know if it will be helpful.

#0 0xb7f9d7f2 in ?? () from /lib/ld-linux.so.2
#1 0xb7d0f1fd in select () from /lib/tls/i686/cmov/libc.so.6
#2 0xb6be37b5 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#3 0xb6c5707e in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#4 0xb6c3e4cf in QApplication::enter_loop () from /usr/lib/libqt-mt.so.3
#5 0xb6e5a2d9 in QDialog::exec () from /usr/lib/libqt-mt.so.3
#6 0xb7b45cc8 in KParts::BrowserRun::simpleSave ()
   from /usr/lib/libkparts.so.2
#7 0xb7b4623a in KParts::BrowserRun::save () from /usr/lib/libkparts.so.2
#8 0xb7b4727e in KParts::BrowserRun::handleNonEmbeddable ()
   from /usr/lib/libkparts.so.2
#9 0xb7f478ff in KonqRun::foundMimeType (this=0x8703af8, _type=@0xbfd39cc4)
    at /build/buildd/kdebase-3.5.6/./konqueror/konq_run.cc:105
#10 0xb7b477a5 in KParts::BrowserRun::slotBrowserMimetype ()
   from /usr/lib/libkparts.so.2
#11 0xb7b4790e in KParts::BrowserRun::qt_invoke () from /usr/lib/libkparts.so.2
#12 0xb7f14ad8 in KonqRun::qt_invoke (this=0x8703af8, _id=7, _o=0xbfd39d90)
    at ./konq_run.moc:88
#13 0xb6ca5787 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3