Example: "Non(S)top Music,Foo,Bar"
If you have a string which contains a non-BMP character (perhaps any 2+ byte character?) followed by a comma, when you paste the string into the scripting area, the text will lose the last character before the next comma. In the above example, it becomes "Non(S)top Musi,Foo,Bar" - which will cause an $if($eq()) test to fail to match.
NOTE: Jira errors when I try to enter a ticket containing the correct string. Replace Non(S)top with the first word in the name of this label: http://musicbrainz.org/label/799f9622-1b64-4e7c-b9fd-9cfda03a0d50 to reproduce this bug.