Microsoft has re-released update MS12-078 to fix a problem with disappearing fonts. Reports starting to appear when users installed the patch that Microsoft released on December 11th. The patch was designed to fix a font rendering vulnerability. In the worst case sceanatrio explotation of the bug could allow remote code execution if a user opens a specially crafted document or visits a malicious webpage that embeds TrueType or OpenType font files.
However it seems that the fix prevented PostScript Type 1 and OpenType fonts from being displayed correctly and the fonts disappeared completely in several programs including CorelDraw, QuarkExpress and PowerPoint. The only way to get the fonts back was to uninstall the update.
“Rereleased update KB2753842 to resolve an issue with OpenType fonts not properly rendering after the original update was installed. Customers who have successfully installed the original KB2753842 update need to install the rereleased update,” wrote Microsoft.