Fixed a bug where the incorrect error was produced for invalid versions.
Fixed a bug where JIRA bug links without a project was returning a weird error.
Fixed a bug where some content wasn't being escaped when it needed to be.
Fixed a bug where too much escaping was done on normal titles.
Fixed a bug where cloning topics would throw a processing error. Also fixed validating cloned topics so that mutually exclusive tags can't be set.
Worked around a bug that was causing mutually exclusive tags to be set on the same topic.