RSConfigTool can't upgrade the database named as *ReportServer

I found a bug about Reporting Services Configuration Tool.  Here's the detail:

1. I installed SSRS as non-default instance.
2. Before configurating reporting service instance, I installed SQL 2005 SP2.
3. Then I used Reporting Services Configuration Manager(RSConfigTool.exe) to configure my reporting service instance.  In "Databases Setup" tab, I created a new database named as 'SSRSReportServer'.
4. After database was created, I tried to apply the setting, UI prompted for upgrading database from version 'C.0.8.40' to the newest version.
5. While database upgrading, I got a exception:
   Could not locate entry in sysdatabases for database 'SSRS'. No entry found with that name. Make sure that the name is entered correctly.
6. Startup SQL Profiler, I caught this SQL Script
   

   USE SSRS[SSRSReportServerTempDB] 

   --------------------------------------

   -- T.0.8.40 to T.0.8.41

   --------------------------------------

   -- No change in tables 

   --------------------------------------

   -- T.0.8.41 to T.0.8.42

   -------------------------------------- 

   if (select count(*) from dbo.syscolumns where id = object_id('SessionData') 
      and name = 'ExecutionType') = 1

   begin

   ALTER TABLE [dbo].[SessionData] DROP COLUMN [ExecutionType]

   end

7. The first USE SSRS[SSRSReportServerTempDB] should be USE [SSRSReportServerTempDB]. 
8. Finally, I tried WMI Provider "\root\Microsoft\SqlServer\ReportServer\v9\admin:MSReportServer_ConfigurationSetting" [GenerateDatabaseUpgradeScript] method, it returned "USE SSRS[SSRSReportServerTempDB]", the same as I saw in RSConfigTool.  But if the database name is ReportServerXX, then USE ReportServerXXTempDB is returned.  It seems the issue happened only when database name LIKE '%ReportServer'

Resolution:

I think the Reporting Service WMI Provider has a bug in report service database name to temporary database name conversion, when database name like '%ReportServer'.  As we know this, we can keep away from this bug easily by avoiding naming database as *ReportServer.  (But it took me several hours to found out this truth...)

[中文摘要]
在設定SSRS的資料庫時，若你是先安裝SQL 2005 SP2後才設定Reporting Service Instance，且剛好資料庫又命名為*ReportServer(不包含預設的"ReportServer"，而是指"BlahReportServer"、"BooReportServer"這種格式)，則會在設定過程中遇到資料庫升級失敗。經過一番測試，確認此為Reporting Service WMI Provider的Bug。最簡單的解決方法是為DB換個名字，不要跟它拼命，要是一定要取這種名字，你可以用RSConfigTool工具裡產生Script的功能，將升級資料庫Script先寫成檔案後手動改掉不正確的USE dbname指令再執行即可。