A computer may stop responding, or Network Browser may unexpectedly quit with a type 12 "error" when connecting to an AppleShare (AFP) server.
Symptom
This occurs after installing Mac OS X 10.1 on the computer.
Solution
Download and install Mac OS 9.2.2 or later, which resolves the issue by installing a later version of the affected AppleShare extension.
Mac OS 9.2.2 is available either from the Software Update control panel, or from Apple Software Downloads (http://www.apple.com/swupdates/).