I think i found a bug. i am not entirely sure if a coupling between mods causing it or it's kspi itself but try this - run timberwind engine in atmos until it overheats. For me - everything disappears and in about 10 seconds game soft crashes with crash handler.
https://mega.nz/#!5tFTzQQQ!ep6yHbMX6zv0Lp3FtSHYt7i9vOVskf-jSmOkUR22iL0 < ksp.log
https://mega.nz/#!QkdxhSIa!zdmUyPQsCst5KbbwqPdtNYEMFC71azHExVv4Un-4Bik < modlist from ckan (+seti greenhouse (wasn't present at the time of the bug on vessel) +my own patch for ISRU (ditto))
Update: Fuel is hydrazine. This doesn't happen when engine is strapped to the starting point, but does happen when vessel is in flight and temp goes to 3200k and over (40 km alt. and up). Checked on previous version - same error.