Hi! Thanks a lot for this post. I was having this problem, that a unicode character was being displayed only in Vista, but never in XP or 2k.

After hours of Googling I finally found your post, and immediately went to MS Word to check it - and as you said - Tahoma font in Win XP simply does not have the characters I needed. This is something I never realized until now.

But can you tell me how you actually resolved this problem? Is there a special font in XP or 2k which should be used whenever you need a special glyph?