Our bug reporting portal is located here: http://www.microchip.com/support
We target to fix all bugs reported as fast as possible. To ensure that you can determine if there are bugs related to the code you have decided to use you can visit the bug reporting portal.
Here you can report both bugs you find and enhancements that you would like to see.
Bugs and enhancement are reported in: http://www.microchip.com/support
Some bugs might have already been fixed before you report it. Or if it is a known issue, a work around article might be already published. Therefore, look into the knowledge base first to see if a solution already exists before reporting an issue or an enhancement.
Here is the instruction on submmitting a bug or enhancement: https://microchip.secure.force.com/microchipknowledge/articles/en_US/FAQ/How-to-submit-a-case