I just logged in and someone said "the server has a terrible connection today", left, and I crashed.
I logged back in and had a huge build privelage delay; I'd destroy a block, it'd pop back and after about 20-40 seconds it would finally get destroyed and drop. I crashed a couple of times and got ported back to my start position with the couple of blocks I took out still there. I found a world hole, crashed. Found another, fell down it (I though world holes were a rendering issue, I thought I could still walk on them), crashed. Got ported back to my previous save and instantly died, dropping about 5 diamonds, half a stack of iron and over 350 mushrooms (among other miscellaneous junk) and crashed. Next login sent me home with nothing, I walked around and then got ported back to a door I'd used a moment ago, walked away, got ported back again, walked throgh another door and got ported back to that door. At which point I gave up.
Unhappy server?