Session/login problems?

Hi, just having some problems getting RT running.

Accessing it through the browser is very flaky. Whatever I click on, I
keep having to login over and over before continuing. Sometimes I press
reload and it will take me to the right place.

I’m running Mandrake 8.1, using their statically built apache-mod_perl rpm
My apache logs appear to have nothing strange in them.

Any ideas? Is it a POST/GET thing, a caching problem?