Rate of change - currently we are growing insanely fast, and there have been a ton of policy changes. Some of them are great, some of them not so great. Some of them made clear, some of them quietly changed. Nothing earth shattering.
Unpredictability - sometimes you get yanked off one project and put on another, without much notice. This is a small downside working at a small company operating at full capacity. It's not necessarily bad at all, if you don't mind a little instability.
Salary still a bit low - Though it's gotten much better, I still think we are paid just slightly below average for the field. Bonuses used to be great, but those were slashed pretty hard this year, as far as I can tell (to compensate for raises).