Wolfenshire : Thanks, it seems to working again indeed :) , hopefully ! But it would be interesting to know about what happened, because it was really bad, making the whole site completely impossible to use.

I have a comparable issue on Deviantart in fact, it started a while ago over there, but NOT to the point it was yesterday and today on Rendero, just a browser freeze for 2-5 seconds. Annoying, but you can still get with it.