Steam Community Bugged?

I have the same problem. Probably some steamcommunity servers are down or some update in process.

Refresh it over and over .

The activity page it's also working weird since last night

ihhhh hax' - der clan ,welcher aus kot besteht

that happens all the time with community.
this one or 503, just reload page a few times

It happens sometimes, just the servers being overloaded. Keep refreshing it or just wait a while.

means there's a sale coming upon us soon ..