I hope I didn't sound upset about it! I've been using "Casey" online since about 1992 (before most people knew there was such a thing as the internet, and also when females were a relatively rare commodity online), so you aren't even close to the first person who has made the assumption that I was a male. If it bothered me, I'm sure I'd have long since stopped using Casey and/or always take more care to make sure I mention something related to my gender.