You might want to consider, at the time of launching PT4, renaming the PT4 log as .logprevious or something. When I experience a crash or another problem, it's not my first priority to try and find the log and prepare shipping it, especially if I should have money on the tables. (I'm sure many people won't even find the log without help in Win7 environment - or restarting the client.) So I restart -> the log with the crash is gone.
Had some severe lagging with custom stats hud population (PT4 crashed soon after) and actually checked the log, there was something about not able to use the cache because of a column I'd made. So I restarted PT4 to check what might be going on with the stat, now everything works fine. But the log is, well, history.
