Hello, I've sent this question to squad but since they're on holiday break I'm posting it here too. Since upgrading to 0.90 I've been unable to do science in career mode by the normal means, as the right click menu on some parts is missing while in flight. In particular, I'm unable to use the Mystery Goo to do science, which is making early career particularly difficult. I'm able to select Deploy while in VAB/SPH/EVA... but when in flight there is no menu displayed at all when I right click. It doesn't seem to matter what class my Kerbal is, so I don't think this is a game mechanic. I posted this on reddit as well, and some there suggested that it's an issue with the 64-bit version for OS X (which I have had no problems with before). I'm on OS X 10.9.5 (13F34) Mavericks. Hopefully someone else out there is experiencing this issue and we can narrow down a cause, it seems to be pretty rare (only found 2 other people commenting about it so far). Until then at least sandbox still works.