If you have the third-party “XXX Strong Mint” Pepper installed you must uninstall it before upgrading Mint. If you are new to Mint do not install XXX Strong Mint. This Pepper uses a function while recording hits that can cause a significant delay in recording a hit to your site (gethostbyaddr()).
If a hit is recorded during the update process you risk irreparably corrupting your Mint config data. Until this Pepper is updated to resolve this issue it should not be reinstalled.
The delay caused by this Pepper can also cause hits that occur during the delay to go unrecorded by Mint and its other Pepper (both official and third-party) in all versions of Mint.
Pepper which offer similar functionality (eg. SessionTracker, NameTags and the official Secret Crush) do not have this issue.