I had a little surprise this weekend with release 9.1.0 that I'd like to share:
For "send email" in the BPM in in release 9.0.1 and prior, you could start to type the name of a user in the "TO", "CC", or "BCC" box and the system would look up the user. NOT SO in Release 9.1.0! You will need to enter the actual email address and hit "enter" before saving it.
ALSO: There is a new "From" field in the BPM email function that is Required! The good news is that existing processes with emails don't fail because the box isn't populated - it defaults to the System email. Any new entries, and any modifications will need to have the box populated.