With regards to the 0.03 balance, it appears that was tipped to your account given that your tip profit is currently 0.03.
EDIT: The 0.03 is from our automated leaderboard daily reward, click the leaderboard tab and view the giveaway terms at the bottom.

Potential Cause
EDIT2: I also noticed you have the greasemonkey add on and need to know if you were running any scripts at the time and I'd like permission to review it if so. Greasemonkey runs scripts on site load which could have made it possible for someone to have thefted your balance. That's my current theory but I'd need more information from yourself of course. A Greasemonkey script could have withdrawn without using the UI which would have not caused the balance to lower. It's important for us to know if you are running any greasemonkey scripts at all currently even non PD ones.