This is on live.
Problem 1: Arose after the launch of U17 (I believe)
Casting hold monster and mass hold monster on draegloths seems to have a chance of crashing instances in both Beyond the Rift, and Caught in the Web (first optional, and second lolth). Has happened to myself 5 times (in less than 24hrs) and have heard of multiple other occurrences. Did not experience the same bug on the draegloth in Reclaiming the Rift. Edit: the glazberu (not sure how to spell it) cause the crash as well if you hold them, found out today.
Problem 2: (Believe this is a known issue already)
Went to my cache the other day after hitting the cap (shortly after u17 launch) and had some items disappear including 2 planar focuses. Filed a bug report and was told "the incarnation cache is not meant for long term storage." Nothing was in there longer than 2 weeks.