According to this discussion: http://bit.ly/F6N8Y
...this has been a problem for at least a year.
Time to fix it, WordPress. I just lost an hour's worth of work (and yes, I save very frequently). I've been toying with the idea of switching to another service, and I think this has pushed me over the edge.
The blog I need help with is secondcitysoiree.wordpress.com.