Seemingly randomly, but *every* time I run it, OO.o gets into a "Not Responding"
freeze and I have to "Force Quit" the application.  It usually happens within a
few minutes of start, and it doesn't seem to ever recover.

While this is going on, it is consuming just over 50% of CPU time (according to
"Activity Monitor"; I don't know if that's 50% of one core or 50% of total CPU
time), and kernel_task is consuming just under 50%.  Running dtruss against the
process shows very few system calls being made.  Occasionally, OO.o will catch
the hang and crash instead of hanging, with the crash notification dialog.

When it's hanging/frozen, I can move windows around, and the application does
redraw itself (no blank squares after other windows hide it), but I cannot
interact at all, and I get the spinning beachball of death.

Usually, this is triggered by me trying to perform a task, but it's no
particular task, as I can usually finish my edits when I reopen the program. 
Sometimes it'll only happen once; sometimes it happens many times in a row. 
Examples include selecting a new sheet in Calc and opening the background fill
toolbox in Calc and Writer.  Occasionally, though, it will do it while I'm not
interacting with it at all.

I'll attach dtruss and "Sample" output.