I could see the below entries in the ULS log
02/08/2010 14:36:46.12 w3wp.exe (0x15F4) 0x18A0 CMS Publishing 8x0a High AppDomainUnloadListener.RegisterSelf() entered lock(this=15368010)
02/08/2010 14:37:25.59 w3wp.exe (0x15F4) 0x1744 Windows SharePoint Services Database 880i High System.Data.SqlClient.SqlException: Could not find stored procedure 'dbo.proc_GetDatabaseInformation'.
02/08/2010 14:37:32.53 w3wp.exe (0x15F4) 0x1744 Windows SharePoint Services Database 98rs High An error occured while trying to grant the user "X" access to the "Y" database on the SQL server. This may be expected if the caller does not have permission to perform this operation in sql server or if the database is read-only. To ensure that SharePoint functions correctly, manually grant this user access to the database before performing this operation. The user must also be granted access to the db_owner group in the database. The following information was provided with this error: User does not have permission to perform this action.
02/08/2010 14:37:32.53 w3wp.exe (0x15F4) 0x1744 Windows SharePoint Services Database 880i High System.Data.SqlClient.SqlException: User does not have permission to perform this action.
Any clues?