I see a similar SYS3170 exception in DOSCALL1.DLL on closing OO 4. My system is dual-core.
I also got the following on highlighting a paragraph of text and hitting the Del key:
07-19-2013 17:58:04 SYS3175 PID 0048 TID 0001 Slot 0097
E:\PROGRAMS\APACHE\OPENOFFICE 4\PROGRAM\SOFFICE.BIN
c0000005
0faa35be
P1=00000001 P2=00000008 P3=XXXXXXXX P4=XXXXXXXX
EAX=00000000 EBX=1668af84 ECX=21051000 EDX=00000000
ESI=1668662c EDI=00000000
DS=0053 DSACC=d0f3 DSLIM=5fffffff
ES=0053 ESACC=d0f3 ESLIM=5fffffff
FS=150b FSACC=00f3 FSLIM=00000030
GS=0000 GSACC=**** GSLIM=********
CS:EIP=005b:13ad0899 CSACC=d0df CSLIM=5fffffff
SS:ESP=0053:0012fc70 SSACC=d0f3 SSLIM=5fffffff
EBP=0012fc88 FLG=00010213
SWOO.DLL 0001:000835be
Otherwise, I have to say this dev build is a lot more stable (if slower to load) than the v3.4 ones were. I was quite pleased with how much more so, at least up until I got this crash.