I'm running Windows 7 64-bit with CoredDRAW X6 and was experiencing the missing fonts issue until I uninstalled the KB update. Default fonts (like Arial) didn't have an issue, but other fonts did. (When you used an affected font, it would not display)
If you didn't use any affected fonts, you most likely didn't see an issue. It isn't just constrained to CorelDRAW. Even Powerpoint 2010 has the issue if you use certain Type 1 fonts in presentation mode; they just disappear.
Laser: Trotec Speedy 300-80 watts
Software: Corel Draw X6, Windows 7 64-bit, Adobe Photoshop CS5
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Please, call me Ron.