Kerbal Space Program

I just noticed this during a career-contract rescue mission but could also reproduce it in a newly started sandbox game.

The situation: I armed my rescue craft's claw, pointed the craft towards the rescuee and waited for the two crafts to connect. While waiting I switched over to the rescuee. When the claw attached, the camera switched its focus to Kerbin and was no longer controllable.
Additionally, the the newly connected craft experiences strange behavior. You cannot switch to it using the 'jump to next/previous ship' keys, it is not selectable in the map and accelerates in a strange way that looks similar to the behavior in Bug #2753.
Returning to the Space Center seems to restore normal behavior. Jumping back into the ship afterwards (via Tracking Station) does not show any more symptoms.

I attached the savegame with the new sandbox game (the quicksave has the situation prepared already, you just need to dock the two objects using the claw) and the craft file that was used in the savegame.
I am using the latest Steam version (1.0.4.861) of the game (btw. 1.0.4 is not selectable in the "version" drop down box for new issues). Actually I have a few mods installed (haystack, alarm clock, engineer redux and some visual modifications), but I don't think that that problem is related to the mods.

In case you want to use the (mod-polluted) savegame:

1. load the sandbox game from the attached zip file
2. load the quicksave and to to the one capsule in orbit
3. arm the claw
4. plot a course to grab the (engine & fuel tank) object, that is floating nearby with the claw
5. before grabbing occurs, switch over to the object to grab
6. as soon as the grabbing takes place, the described behavior starts

Instead of using the savegame, just use the Docking Bug Test.craft, launch it into orbit and perform the grabbing as described above.
Docking with the docking ports does not cause the problem. I checked that with the same setup.

In my original game, where I first discovered this problem, the game froze for several minutes but did not crash (at least not immediately). After the freezing stopped, I could continue playing for a short time and then it crashed. But that crash might be related to the mods I am using.
As soon as I have the time, I will try to reproduce it with an unmodded game.