As of today, I've been at my job for one year. I know a lot more than I did a year ago about character encodings, XML, QTI, Perl, Subversion, pointers, data structures, parameter validation, polymorphism, system-building, merciless refactoring, and making machines do what I want. Also I shipped most of these.
I know less than I did a year ago about CSS. It seems like a fair trade.