I made copies of the stack, renamed them, etc. It seems to happen if I 1) open a stack, 2) drag a button on it from the toolbar, then 3) Save. If I click it, all the stacks go faded white. If I click again I get the dialog box "Livecode has stopped working". The stack in question has one field on the card with 36000 short lines of text in it. It's been saving fine the last few days.
After making copies, renaming them, moving to new areas of the disk, etc, the problem went away (about 6 Saves have succeeded). Now it has started again.
I can't find a pattern of what I am doing that starts this happening. It's a great bit annoying - I can work, but I'm saving every couple lines of code, and then every 5-6 Saves have to quit, shuffle and copy files around, and start again.
Any thoughts? I can't work very well this way

Arrrgh! Now it's happening if I Save without making any changes at all.