0.40 Bug: Game perma frozen, Build Mode/Walls

[donzeac]

Version: 0.40.0

Description: Exiting build mode freezes game (walls and gates)

Steps to Reproduce: I spent nearly an hour trying to close off wall around town in every way possible (took the wall in weird direction because it at least didn't freeze). Spent another hour randomly building wall/gate sets, froze 9 out of 10 times on average (approx. 40-50 restarts and freezes).

Consistency: As stated in Description, 100% chance to reproduce freeze if I repeat identical actions, 90% chance to freeze with new/other actions (wall and gate related only).

System: Win 7 64 bit, Intel core i5 3.40GHz, GeForce GTX670

Serverity: Crash (more Frozen than crash. I let the comp sit for ~20 minutes once, nothing changed. Since I had to ctrl+alt+del and stop process, no crashDump.dmp was generated)

Attach: None, explined in Serverity
EDIT: Changed subject to include version number