Font size discrepancy

[Lei Kong <lei.kong@gmail.com>]

The actuall font size is smaller when starting kde from  command line,
than the kde font size when started from kdm.  I am running debian
testing on my thinkpad z60t, and the font I am using is Bitstream Vera
Sans.

I noticed there is no difference in the console font size, which
is bitmap font, if I remember correctly.

My guess is the system resolution is different in two cases,
I mean the DPI thing, but I have no clue why they are different.

Can someone tell me how to correct this?

Thanks.

Lei