Do underscores in a MySQL table names cause issues?

Question

Do underscores in table names affect performance or cause issues on some platforms?

For example, user_profiles

Would it be better to use user

Answer 1

I found a few links to MySQL bugs that have either been marked closed or can't reproduce regarding underscores. As far as I know there are no issues - I always use underscores over camel-case and haven't experienced any problems.