Kerbal Space Program

My problem is possibly related:

I attempted to attach the large ASAS, and it snaps into place but immediately snaps away to my cursor. I can not attach it again. The only way to exit is to alt-f4. This is non-radial straight stack attachment.

Further, after snapping back to the cursor, the attachment point on my vessel (green balls) where I attached the ASAS is no longer visible.

Windows x64
Massive specs.

Could you please include your output_log? It seems very similar to the following issue - #1099

Well, as I booted KSP up to attempt to get the output_log (Sorry about not posting that, as this is the first game I have loved enough to report a bug :) Steam detected some corrupt files, and promptly installed. This seems to have fixed both my issues. Not sure if this will help anyone else.

Now just to find out which mods I can still use.

I have been trying to find the source of this issue as well since it has been happening to me after last night's update whenever I place radial objects. So far I had some success in fixing this by erasing everything inside my /parts folder as well as my /plugin folder. Maybe it has to do with some sort of mod incompatibility? Hope this helps.

It seems there has been a hotfix. They addressed the issue of the whole unresponsive exit/launch. So half of the original problem is fixed. Still new to this and don't know how to change the priority and such. So if you know how and find this, feel free to change it :3

I have a very similar issue. When building a rocket and trying to attach a part, it will attach for a split second then detach. The green connect ball will then disappear and the item is then sometimes permanently stuck to the cursor. Sometimes I am able to delete the item in the item select menu. Also, when I load a complete rocket, if I remove a section or part and place it off to the side, when i try to select the red highlighted removed section, it will select the other section I kept unchanged instead. I can only select the section with a command module. I'm clicking directly on the red highlighted section, and it selects the other. This happens almost 99% of the time. This needs to be fixed, I paid $23.00 for this game and now I can't even build a single rocket!

I noticed this a lot in earlier versions of the game (before 0.20). Check the Alt+F2 log, if you see lots of exceptions, the game is unstable and you need to quit asap without saving, as any saved crafts will cause the same corruption on reload

I have exactly the same issue since KSP 0.21. Every later game version up and including the current 0.23 is completely unplayable. I hope this will get a fix

Namely, adding any radial part breaks building completely, with FPS dropping to 3-5, Stack Overflow Exceptions flooding the console, green attachment marks freezing un place and a subsequent CTD

This happens on a fresh install.

How to reproduce:
1. Enter VAB
2. Add a command module
3. Add a fuel tank
4. Set symmetry to 2- or 4-sided
5. Try to add any radial-mounted part

Win7 Pro x64, NVidia GTX 550Ti, AMD Phenom II X4 955 (@3.2GHz), 8GB DDR3-1333MHz RAM

still there on 0.24.2, VAB and SPH.
also, "save ship" doesn't work.

windows 8.1 x64, x64 executable.