I'm having the same issue:
6/26/12 12:00:01 AM com.apple.RemoteDesktop.agent stream had too few bytes
But it normally follows this error at 11:50pm.
6/25/12 11:50:08 PM com.apple.emailrules.nightly /System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/zope/ __init__.py:1: UserWarning: Module twisted was already imported from /usr/share/caldavd/lib/python/twisted/__init__.py, but /System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python is being added to sys.path 6/25/12 11:50:08 PM com.apple.emailrules.nightly __import__('pkg_resources').declare_namespace(__name__) 6/25/12 11:50:09 PM com.apple.emailrules.nightly /usr/share/caldavd/lib/python/twisted/mail/smtp.py:10: DeprecationWarning: the MimeWriter module is deprecated; use the email package instead 6/25/12 11:50:09 PM com.apple.emailrules.nightly import MimeWriter, tempfile, rfc822 6/25/12 11:50:13 PM com.apple.emailrules.nightly /usr/share/wikid/lib/python/twisted_overrides/microdom.py:176: SyntaxWarning: assertion is always true, perhaps remove parentheses? 6/25/12 11:50:13 PM com.apple.emailrules.nightly assert (oldChild.parentNode is self,
The 3 Mac Mini servers running OSX 10.6.8
Server Admin Version 10.6.5 (328.4)
Model Name: Mac mini
Model Identifier: Macmini4,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.66 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 3 MB
Memory: 8 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MM41
Sorry for very late responce.
I finally found Remote Desktop setting was wrong and solved this problem.
1)Cheking info(Cmd+i) for each clients of the RemoteDeskTop.
2)Move to Reporting Tab and off the check if you don't want.
This setting is copy at first time to add to the list same as Preference of Remote Desktop, Reporting panel.
So if you still have trouble, please check.