Is there a way to get konqueror to work with a SOCKS proxy?

I do this:

$ ssh -D 12345 user@remote

Iceweasel works fine when I set the proxy to SOCKS localhost:12345.

now I'd like konqeror to use that SOCKS4/5 server on localhost. But whatever I 
check on the SOCKS tab, I get an error message. I tried tsocks, but konqueror 
still connects directly to the net.

Does anybody have an idea?

Nik