Frequent occurrence of accidentally pasting selected lines of text in PuTTY because it's copy-paste mechanism works like X11 selectors (right-clicking causes the currently selected text to be pasted).
<glitch> One of the best board-game to big-screen movies evar! :U
<muraj> One of the best board-game to big-screen movies evar! :U
<muraj> crap, sorry, putty paste