I get very aggravated when my software tries to second-guess my intentions. An example of this is when OpenOffice tries to autoformat my lists. I type “3.1” plus some text, when I hit “Enter” for a newline my numbering changes to “3”, with “4” on the next line. Really annoying.
Of course, you can turn this off (along with many other options). Head up to Tools->AutoCorrect and uncheck “Apply numbering – symbol:”. Thanks to Steve’s BPCA blog for the tip.