For me they are set correctly when using pc105 (US, standard). However, sometimes a few of the keys do not react very well; the RH shift key, RH space bar and up button. May be hardware related though, I will test on my Symbian phone later.

By the way, it also tends not to work when it reconnects. Or maybe it just sometimes doesn't work at all for some time, it's a bit hard to tell since it's so irregular. After some time it may start working again.
When it does work, the number keys are set correctly.

(I have a Dell Think Outside keyboard, a rebranded Stowaway)