[Evolution] Evolution locks up

[Jonathan Ryshpan <jonrysh pacbell net>]

Every so often, randomly, 2 or 3 times per week, evolution stops responding to every kind of input: keyboard, clicking on messages, clicking on menu items, etc.  Except that cover and uncover events work properly; the screen is repainted as needed when part of an evolution window is uncovered.  Process CPU usage is at real time or a little faster (indicating that it's using more than one processor).  Has anyone else seen something like this?

System is 4 processor AMD x86_64 running Fedora-20 with all updates installed
Evolution is version 3.10.4

Thanks - jon