How to get a white background and black text on lucid 10.04 kde desktop

[user1]

>>
> You may have to register a new 'account' at launchpad.

Oh yes, I tried to do that, but the procedure was very "sticky" (means 
the system filling the registry formular by it self not letting me do 
that) but I ended up with an account to launchpad, but I could still not 
get into the kde bug tracking system to report my bug, saying wrong 
username and password or something like that:-)