QuoteThere is a really bloody nasty security hole in Windows at the moment, that uses malformed WMF files to execute arbitrary code on your system. The bad thing about this is that simply viewing an effected image will cause this security hole to execute. Even us using Firefox aren't 100% safe; the image won't fire up straight away like on IE, but if you later happen to browse your cache and hit that file... yeah, not safe.
http://www.microsoft.com/technet/securi ... 6-001.mspx
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