Map change crashes. +mdmp's

I have 2 mdmp’s from map change crashes. The game has crashed about 6 times now in the last 2 days but I only have 2 core dumps in the source sdk 2007 folder.
hl2_4104_crash_2012_9_16T15_2_29C0.mdmp (101 KB)
hl2_4104_crash_2012_9_16T15_4_2C0.mdmp (112 KB)

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.