There are lots of places in moodle where we had custom CSS that does not look good on Boost theme. Most of them were addressed when working on Moodle 3.2 release
This epic collects together remaining issues that may or may not be fixed before 3.2 release (November 28th).
We appreciate community help on providing patches for these issues.
Reminder: due to a jira "feature" list of issues in epic is not visible unless you are logged in.