MantisBT version 1.1.7 is a maintenance update for the stable 1.1.x branch. All installations that are currently running any 1.1.x release are advised to upgrade to this release.
This release cleans up most of the remaining issues in the 1.1.x series, and is perhaps the final release of 1.1.x before finalizing 1.2.x development.
The release changelog can be found on our changelog page.
It can be found on our download page.