Trying to search for a gem returns only results that start with letter A. I've not verified whether it returns all of them, or there is a cutoff (which would mean that it's not about the letter, but the total number of gems).
For example, searching for "rails" returns 4 pages of gems matching /^a.+rails/i, but not rails itself:
Searching for something less popular, like "surrealist", returns nothing:
On the other hand, searching for an A-named gem actually returns it:
