There is no v1.25 viewer... Do you mean v1.23 ?
You cite both "SL Viewer" and "Cool Viewer": are you encountering this bug in the official SL viewer as well ?
I tested with the Cool SL Viewer v1.23.5.3 here, and could not reproduce the crash.
Please, see the
Rules for this forum, and provide what is asked there (about box reports, log).