I've had also a CTD (Crash to Desktop) when trying to remove a rubber-band (intro/third level in hydro)
Here's my report from the Event-Viewer of my Win XP SP3 (OS):

0000: 41 70 70 6c 69 63 61 74 Applicat
0008: 69 6f 6e 20 46 61 69 6c ion Fail
0010: 75 72 65 20 20 66 6f 6c ure fol
0018: 64 69 74 2e 65 78 65 20 dit.exe
0020: 30 2e 30 2e 30 2e 30 20 0.0.0.0
0028: 69 6e 20 67 61 6d 65 5f in game_
0030: 6c 69 62 72 61 72 79 2e library.
0038: 64 6c 6c 20 30 2e 30 2e dll 0.0.
0040: 30 2e 30 20 61 74 20 6f 0.0 at o
0048: 66 66 73 65 74 20 30 30 ffset 00
0050: 38 30 33 37 30 36 0d 0a 803706..

Here is more information on the crash...

Log Name: Application
Source: Application Error
Date: 11/28/2010 3:52:54 AM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: XT2
Description:
Faulting application name: foldit.exe, version: 0.0.0.0, time stamp: 0x4babd899
Faulting module name: game_library.dll, version: 0.0.0.0, time stamp: 0x4c62b33e
Exception code: 0xc000000d
Fault offset: 0x00803706
Faulting process id: 0x13e8
Faulting application start time: 0x01cb8ed964597914
Faulting application path: C:\Program Files (x86)\foldit\foldit.exe
Faulting module path: C:\ProgramData\foldit\cmp-binary-629f7556db2c2874bf40fdf57448b05e\game_library.dll
Report Id: e2f61ad7-facc-11df-9c27-002564561509
Event Xml:



1000
2
100
0x80000000000000

21844
Application
XT2



foldit.exe
0.0.0.0
4babd899
game_library.dll
0.0.0.0
4c62b33e
c000000d
00803706
13e8
01cb8ed964597914
C:\Program Files (x86)\foldit\foldit.exe
C:\ProgramData\foldit\cmp-binary-629f7556db2c2874bf40fdf57448b05e\game_library.dll
e2f61ad7-facc-11df-9c27-002564561509

I have tested this, even in offline mode.
I used a single band, just 1 band, and Disable Bands will crash the program.
This also happens on Online Mode and Offline Mode.

I attached some selected events from Events Viewer.
I'm new, I don't know another way of attaching files that are not text files.
I packaged the event files into a zip file and added the .txt extension at the end.
Rename folditCrashEventFileszip.txt to folditCrashEventFiles.zip

Workaround: do not use keyboard shortcuts in intros, use proper menu buttons.

I used menu buttons to do my tests. Not the keyboard shortcuts.

Never happen on my XP sp3 and Win7 when using buttons. Sometimes crashes when using keyboard shortcuts.

Well, I only tested it in two different intro puzzles. So, it's possible that just those two are affected (for some reason). I haven't tested it in a full puzzle yet and not with keyboard shortcuts. I'm also running XP sp3 (I probably should have mentioned that in the first place <.<). It's also possible that it's a problem local to my system. I'll look around and see if I can't find a crash log or something.

So far, I haven't checked to see if disabling individual bands causes any problems or if the global disable extends into the normal puzzles, since, honestly, I don't use the function very often.

Stop wiggle or any action before remove bands.

Bumping, because it should be fixed.
Crashing client on intro puzzles can be a bit disappointing for new player.
Do that again - delete band during wiggle in 1st banding intro kill client instantly.

Thanks for the reminder, this is an obvious bug that should have been taken care of a long time ago!

This has been tracked down and fixed. It will go out in the next release.

Marking as resolved as this has been released.