I get this thing and im just wonder what is the main-folder 02:20 PM [INFO] CButD: CraftBukkit download new Build, please stop the server and copy C:\Users\(NAME)\Documents\CraftBukkit Server\bukkit_update\craftbukkit-0.0.1-SNAPSHOT.jar to your Main-Folder.
BTW When you download the server where is the start server file? PLS help EDIT by Moderator: merged posts, please use the edit button instead of double posting.
I'd just like to point out that this thread is from April 23, but to answer your question, refer to here.
this doesn't help cause i have done what it says and i still get the error but i haven't had this message till the 1.3.1 bukkit update
I just tested on a clean install and followed those instructions to the letter in order to test, and I had no problems whatsoever. I'm afraid you must be doing something incorrectly.