Here is a flavor or some more WHS errors that I have been getting in the eventlog and not really had the time to do the research to figure out what they are. Looking at these (and there are man more), does not inspire too much confidence 
and I am varied to start using this in "production" mode. Hopefully they have been fixed in the RTM version but as I am running RC1, not sure.
One:
Event Type: Error
Event Source: MRxSmb
Event Category: None
Event ID: 8003
Date: 05/08/2007
Time: 13:05:04
User: N/A
Computer: TRINITY
Description:
The master browser has received a server announcement from the computer IO that believes that it is the master browser for the domain on transport NetBT_Tcpip_{C301E839-1BC7-4B75-B3CC. The master browser is stopping or an election is being forced.For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00 00 00 00 03 00 52 00 ……R.
0008: 00 00 00 00 43 1f 00 c0 ….C..À
0010: 00 00 00 00 00 00 00 00 ……..
0018: 11 00 00 00 00 00 00 00 ……..
0020: 00 00 00 00 00 00 00 00 ……..
Two:
Event Type: Error
Event Source: HomeServer
Event Category: Backup
Event ID: 267
Date: 04/08/2007
Time: 04:20:16
User: N/A
Computer: TRINITY
Description:
Client Backup server failed at d:\qhsv1_rc\qhs\src\backup\util\diskfile.cpp(421)For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Three:
Event Type: Error
Event Source: HomeServer
Event Category: Backup
Event ID: 272
Date: 04/08/2007
Time: 04:20:16
User: N/A
Computer: TRINITY
Description:
Unexpected error 0x45d from WriteFile on D:\folders\{00008086-058D-4C89-AB57-A7F909A47AB4}\Data.4096.14.new: The request could not be performed because of an I/O device error.For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
