ERROR: Unable to write file : DISK_ERR, leads to Out of Memory errors.

Right - just reproduced. Mine did it early too:

trying to log...4033
trying to log...4038
trying to log...4043
trying to log...4050
ERROR: Unable to write file : DISK_ERR
FAIL before 4052.196215629577636718 after 4060.322003364562988281
trying to log...4078
ERROR: Unable to write file : DISK_ERR
FAIL before 4080.756432533264160156 after 4088.670434951782226562
trying to log...4095
ERROR: Unable to write file : DISK_ERR
FAIL before 4097.461118698120117187 after 4105.502131462097167968

I'll see what I can do about fixing this next week.