I just finished installing a door a little over an hour and a half ago. The EXP even goes into the General Events section, not into the Inventory Events section. It's most definitely working, however:
1 Year 15 Day 103, 10:17
You have installed a Lock on the Corona-class frigate, Karma Chameleon.
2 Year 15 Day 103, 10:17
You gained 20 XP with the following message: For successfully modifying a lock.
____________That's got to smarts.