I tried to re-send the text of an email I sent to our unit about a month ago, prior to the domain change, that contained several usages of BBCode tags, including [url]. I kept getting the following error:
I was able to isolate the problem down to sending any message that includes both the use of BBCode url tags and single quote, apostrophe characters, like those used in contractions. This problem/bug is suspiciously similar to the bug reported about saving events with BBCode url tags. Please address as soon as you can.