Pixie informs me that she has no idea what you're talking about, she's not sneaking into your home at night, and that you should buy some mint choc chip next time.
Thanks for the kind words, and to answer your question: bug squashing can take anywhere from one day up to most of a week, depending on the number, severity and complexity. Fortunately a very generous player named Chris helps me out with tech support, but even so it can be a huge time commitment.
It's one reason why I like updating every two weeks - it means that players aren't left wrestling with bugs for too long (and anything game-breaking I always release a patched version within 12 hours) :)