I'm not sure where to make suggestions of this nature, so I'll toss it in here:
When creating new issues in the Mantis bugtracker, I think it would be helpful to be able to include basic OS information as part of a standard ticket field. Preferably going beyond simply Windows or OSX to include major releases for each OS. This would make it easier to report OS information with each ticket instead of including it in the body, and would also make it simpler to search or filter issues on the backend.
Obviously this wouldn't need to be a required field for suggestions and such, but for bug reports I try to make it a habit to specify the OS in case it makes a difference, and this would help formalize the process.