This is known bug.
But still no fix only workaround mention there available.
Peter Gueckel wrote:
In Fedora 16, I have noticed for a number of weeks now that whenever
in, there are launchers on the task bar for konqueror and dolphin. I have
tried repeated to get rid of them, but every time I log back in, they are
How can I get rid of them once and for all?
Alexey Kurov <nucleo(a)fedoraproject.org>