One of the bug reports lead to a buffer overrun problem in the debugger, when formatting wide string literals. Fixed in v8.0 RC2.
(similar code for plain string literals, so a little too much code was copied to the wide string literal function).
Buffer overruns can cause all kinds of "unrelated" problems, and not everyone is using wide strings. I'm not saying this is to root cause of the problems, but it could be.