Hi! Im now going to try pre 1.8.1 Minecraft update to server.
Before you update do this:
Go to %appdata%, when you are there press ".minecraft" folder.
Then copy Bin folder, make new folder to you desktop and paste it there.
This is good, cause if we are going to back 1.7.3 on server you can just replace your new 1.8.1 bin with the old 1.7.3 version.
Lets hope that 1.8.1 is not buggy!
Hope it wont be.
And also, if you want to back up your files without having to wait for the whole bloody bin file to move to your desktop, you can download a program called
FBackup (Free Backup)It's fairly easy to use, and unless you have a very small bin folder, this could save you a lot of waiting. :3