The whole front page (of this site, meta) is old questions modified 3 hours ago by Community. What's going on here?
The site https://meta.stackoverflow.com/ played for a long time a dual role, that of the meta site for Stack Overflow but also that of a meta site for the entire Stack Exchange network.
As a consequence of this split some links we had to https://meta.stackoverflow.com/ were updated.
This did not go as planned. On the one hand things got bumped, and on the other hand some things got broken. The SE team is aware of the problem, in general and for our site specifically (though basically all sites are affected); see for example Community ♦ bot doesn't like markdown?
Update: According to a recet comment on the linked post, what was broken should be fixed by now (and indeed the posts got edited a second time, yet now, though hardly relevant, not bumping them again). Thus, in case something should still be broken (as opposed to only being bumped) it could make sense to report it.