Yup, reverting your 04/13/2001 server patch enabled my no-Windows install of Notes/Wine to start working again.
With recent CVS versions of Wine, Notes 5.0.3 was dying with:
err:win32:fixup_imports No implementation for KERNEL32.dll.0() imported from C:\windows\system\netbios.dll, setting to 0xdeadbeef err:win32:fixup_imports No implementation for KERNEL32.dll.0() imported from C:\windows\system\netbios.dll, setting to 0xdeadbeef err:ntdll:RtlpWaitForCriticalSection Critical section 0x40a9bd90 wait timed out, retrying (60 sec) fs=021f
i had the very same problem, "fixed" with "netbios=builtin" workaround... martin