We have 56 repositories.
Crucible -> Create Review -> Browse Changelists -> Repository
Only the first 50 repos in alphabetical order show up. We verified this by deleting two inactive repos and the next 2 alphabetically showed up. This prevents us from participating in Code Review on 4 of our projects. I found a temporary work-around by typing the repository in the dropdown, hitting tab, then it will populate the changesets by that repo.
We are on version:
Atlassian FishEye analysis with Crucible code review. (Version:3.4.4 Build:20140520040848 2014-05-20)