I imagine she has a great number of fans and readers wondering and confused, and I am sure that this is difficult for her. I know of a couple of other instances where authors deleted forum accounts, friended or deleted their LJ's, or left a community in a sudden fashion, and in all of these cases it was a conflict with another individual community member over criticism or the content of one of their stories, which clearly, is not really anyone's business but the parties involved. However, when a personal conflict with a reader, beta, or other author occurs, it can lead to a lot of speculation and hurt feelings, taking sides, etc, and the only way to avoid that is for one of the parties (or both) to retreat quietly and say nothing about it. Some remove all of their fics, others provide pdf or doc copies through their readers and circulate them privately.
Depending upon the circumstances, asking questions or speculating about what really happened can lead to compounding the original problem. If Jenna wants to let people know, I am sure she will post something for her fans and readers at some point, and it is probably appropriate to wish her the best and leave it alone.
Louise
FanFic Moderator