I've dealt with it for a while, have done searching on this forum and other tech sites, but have yet to determine a fix - as the crashing frequency becomes much more prevalent.
Running the Zimbra Client 188.8.131.5231 on Outlook '10 with a Window 7 64-bit OS.
On a good week my iPeripherals are synched maybe for 2-3 days and on a daily basis Outlook will force a program restart at minimum 3-4 times. Upon restart, I'll need to attempt it often another 3-times just to get it opened at all, as it typically crashes immediately upon reopening. Often Outlook will revert to safe mode startup, will fail during that process, then be required to go through a full repair mode before hopefully starting back up again.
Outlook doesn't seem to have a fix that I have found, as I am current on all updates. Not too often do I receive actual error messages that do provide information that I can work with, but I did save one from roughly a month ago - see below.