The stack heap collision error is due to SL memory issues. It means a script has died. Bounds check errors are a bit more obscure, but essentially mean the same thing.
If you get multiple errors (e.g. you get 4 sets of Script Run-TIme errors and you are wearing 4 cuffs)... most likely it is your cuffs. But sometimes only one or two cuffs might be giving the error.
You can confirm that it is indeed the cuffs are giving out the message if:
- while wearing them, you tp and get the message; AND
- you detach them, and while not wearing wearing them, you tp, and you don't get the message any more.
To fix, simply
rez a new set of cuffs (by saying "/1c" or clicking the cuff icon).
If that doesn't solve the problem, then we need to
- re-setup the cuffs (say "/1." and hit "re-setup" on the menu).
- re-activate the plugins (by wearing the plugin Activator from inventory).
If this still doesn't work, it means that Second Life has probably corrupted your attachments, and you need to
update them.