After importing, rebuilding of the search index is required. On the "rebuild caches" pages there are multiple types of rebuilds available. I've done the rebuild search index. Should the other rebuilds be done too, or are they not required because the import process has already done this?
Sometimes the 'Rebuild Thread Information' with 'Rebuild position and post counters' needs to be done, but that relates to a specific case involving mini-me avatars, so if they're working there's no need.