','Word 2003 has this terribly annoying habit of flipping to overtype mode at the worst possible time. This usually happens to me when I want to insert a quote in the middle of text. I don't look at the text on the screen whilst typing and, wouldn't you know it, instead of inserting the quote, Word typed over the good stuff I just wrote (drat and double-drat)!...

Fact is, some how, some way, I inadvertently touched the insert key. The insert key acts as a toggle that switches Word from insert mode to overtype mode, and back again. If you get yourself in this predicament where all your good stuff is disappearing before your eyes, simply touch the insert key and the world will be sane again.