This is probably old news, but I have a 150 and Pandora freezes up when I hit the search button. It's mentioned in the notes of the 1.03 firmware update but I called Pioneer to see if was fixed in 1.04 (which is what my unit came with) and that this is an isolated issue, or whether it's still a known bug.
It's a known bug. He didn't know if Pioneer firmware, or a new version of Pandora would address it.
The workaround is just to operate Pandora as though it's a non AppRadio app, which works.