I was doing a "By Count" basic search for <JerTalmud ~ Yerushalmi Talmud Berakhot-Niddah> across my entire library and got an out of memory error. At the point of the crash memory usage has risen to 885Mb. Repeating the search later led to no problems, so possibly there's a memory leak somewhere else.
0535.Logos4Crash.txt
8054.Logos4.log