I recently (this morning) set up a Minecraft SMP server using the LogMeIn Hamachi program, everything works fine except one EXTREMELY annoying bug that I never had on ANY other server: When I place a torch in darkness, the torch automatically disappears from the wall and my inventory. Now I just tried to remove the only one out of 20 that stuck to the wall and it doesn't come off.
Allow me to say WTF? Did that happen to anyone else? What did you do to solve the bug ?
Have you set your server properties correctly? It sounds like its an issue with placing in general. Check your... Ops.txt, i believe it is, and make sure your character name is included. Might wanna check out the server setup page on the wiki just in case you're missing anything else.