teTeX 1.0 on Sun to 3.0 on Mac weirdness

Hi,

     I've had teTeX 1.0 installed on my Sun workstation under Solaris for
millenia and have been using pdflatex along with Ppower4 and foiltex 
to generate all my scientific presentations for the past several years. 
Having recently obtained a Mac Powerbook running OS 10.3.8, I installed 
teTeX 3.0 using fink and have attempted to recompile my presentation 
files. The weird part is that my slides on the Mac wind up being 
consistently oversized, spanning more than their designated slide. This 
doesn't seem to happen to my text documents with figures, only my 
foils stuff. The slide size hasn't changed (still letter-sized), it just 
seems like some default parameter is different between my two 
teTeX installations. I have no idea where to start looking to fix this 
problem and I've had no luck finding anyone with a similar problem 
through Google. Does anyone have any ideas or should I resign myself 
to re-editing all my presentation files so that they'll produce the 
right-sized output on the Mac?

Help?

Thanks,
KIM...