So directly related to the same problem (and this is what I initially noticed),
When I load my visio file (unfortunately, I cannot post it), but I had a bunch of text locations that were placed throughout the diagrams, and all fit correctly.
Now, in 2010 in Win 7, the font sizing seems to be wacky. Text is bigger then it showed up in XP.
The font TYPE is correct (it's the same font as previous), but now the font size seems bigger then it should be (or was specified when the text was created).
I've specifically used the Kartika font @ 6pt. What shows up, is Kartika 10-11pt (kinda hard to tell tbh).
I'm stumped why this is happening.
Just to clarify, the text is still actually referencing Kartika as I had originally chosen, so it should be ok that way.