Microsoft makes .txt files dangerous!

This security update resolves a publicly disclosed vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if a user opens a legitimate rich text format file (.rtf), text file (.txt), or Word document (.doc) that is located in the same network directory as a specially crafted dynamic link library (DLL) file.

-- Microsoft makes .txt files dangerous

(Courtesy http://lwn.net/Articles/459240/ )