From a post on Full Disclosure:
Today I received information from one corporative user that installation of unofficial WMF patch (wmffix_hexblog13.exe) on Windows XP workstation causes to him network printing problems. The problem was solved via System Restore.
The experiment was repeated and the result was identical. After installing the patch at the attempt of printing documents either the error message ?printer error? was shown or nothing happened at all. Workstation had one printer Samsung ML-1210 installed. Has anybody encountered something alike?
As always, we caution network managers to follow prudent practices in rolling out an unofficial, unsupported patch. Set up test systems before deployment, closely monitor post deployment.