SQL Server Plug-in reports inaccurate Database Space information

I'm trying to track down some inaccuracies I'm seeing in the SQL Server Plug-in for Grid Control. Every database I have on my Database Instance has a Critical alert regarding the Space Available %. For my example, we'll take the 'master' database. it is showing as .81% Space available. My guess is that the plug-in uses the sp_spaceused procedure to get the information. When I run that, I get the following:
database_name: master
database_size: 72.00 MB (This is the size of the database file and the transaction log, 64M + 8M)
unallocated space: 61.34 MB
reserved: 2728 KB
data: 1072 KB
index_size: 1056 KB
unused: 600 KB (Total amount of space reserved for objname but no yet used.)
If you take 600 KB/72MB , you get the .081% available. However, that is not accurate. (I've verified both numbers in the OMS mgmt$metric_hourly view).
I don't think the plug-in's use of the unused value is correct. This is space allocated to objects in the database, but available. I wonder if this metric should be looking at the unallocated_space/database_size rather than the unused piece. This would show this database to have 85.2% available space.
The flaw I see in sp_spaceused is that it is taking into account the database and transaction log as a single unit. Rather than separate entities.

This is erroneous behaviour by the SQL Server plug-in. Please refer to bug 7186134. The bug is planned to be addressed with the newer version of plug-in to be released as part of Plug-in Release Cycle 9 (due for RTM in Dec. '08)

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