I have a space-station made of few modules for now, one have a commandpod mk1 and a simple winch (part KAS.Winch1), no anchor or magnet connected to it.

First of all, the dedicated gui didn't display the extend/retract action (the wide one which allow fine control of it).

Then I have extended the wire, grab it with a kerbal, grab a ladder, moving around and finally get back to pod, grab the ladder again, unplug the wire (while this time, cable goes a few time "inside" other parts), going into the pod, doing a few other thing like switching from a vessel to another then I can't go back to spacecenter anymore and an exception appears in the log many time.

There is a lots of exception (logfile is ~15 MB length), and I have to kill ksp to get out (I would be literally "stuck in space" otherwise).
KAS plugin version is 0.4.6
I have had the previous version before, which I have completely delete from gamedata folder before copy the 0.4.6.

IMPORTANT (or not) NOTE: the ship use the previous KAS winch, and I don't know how KSP handle update of parts on saved vessels in persitent.sfs file.
If the issue comes from that, a procedure will have to be defined to update saves and saved/shared ships.

New info: after loading the save made some time before the issue, the cable is extended, but I have the winch GUI fully working and I can retract the cable.

logfiles are here: http://www.mediafire.com/download/wb7ae6nv5ku4ai7/KSPlog_KASwinch_issue_JK230214.zip