I use DIA extensively to produce diagrams for my phd thesis (thanks, guys!).

Upgrading to 0.91 (from 0.90) was in many respects a very good upgrade, but
for some reason, pdf really doesn't like the eps files I export from 0.91.

I layout the document using LaTeX, and see the following behavior (all eps
from dia): 

View eps fig directly:  looks fine
Preview in xdvi:        figs are pixelated
generate postscript:    looks find on preview, haven't printed yet
Go to PDF via postscript: figs pixelated again
Go to PDF via dvipdfm:  also pixelated.

Using 0.90, and the oldstyle X fonts, every way came out looking good.

Since more people can view pdf than ps, I'd really prefer to generate good
pdf. So, on the one hand DIA appears to be off the hook (I can preview eps
just fine), but since this has so-far only occurred using eps from dia, I'm
wondering whether you do something non-standard in your output (like
perhaps you generate an embedded preview pixmap, which is what I'm managing
to use in the pdf?)

Any thoughts at all? I'd be happy to provide both eps, ps, and pdf files
for your comparison.