[simsimt]

Nice hack. Installed.

Only one thing: Don't you think it's a little odd to have 4 different phrases for only one sentence? This makes translating the sentence harder than usual.

member_has, members_have, no_member & no_members could be combined all together in 2 phrases. Or even in one phrase if the sentence re-constructed. For example:
Number of members who have read this thread in the last {1} days: {2}