>>No, they're about the same relative size, usually. However, we've seen cases where different video drivers can cause different appearances, especially on laptops...Also, if you use any non-truetype fonts, or any unusual ones that the user may not have, you can have trouble. Are yours all common, like Arial?
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>Yes, I'm using Arial 10 pt. and both my machines are desktops (one has NT, but the user's machine are Windows 95, so I have to rule that out as a factor). Now I'm really perplexed, given that you say that your fonts are the same relative size in two different resolutions. It sounds like what I'm experiencing is not the norm.

I guess so...no one here has 19", so I can't say about that :) But normally there's no need to resize anything if you develop at 640x480, except that objects/fonts will appear rather small at higher res., and the way around that is to resize to larger based on resolution, or I've even heard of creating special versions of app for different resolutions...