Hi Nipster,
It is a werid issue and we cannot reproduce it. But someone has met this situation and provide a solution. Please do the following steps and have a test.
1) Shut down Visual Studio 2008
2) Go to your Task Manager and make sure that the dev.exe process is NOT running. If it is, end the process.
3) Go to C:\Users\[user]\AppData\Local\Microsoft\VisualStudio\9.0 and delete all the .tbd files. There will be four of these files. If you can't seem to navigate to this folder, you will have to go to your Folder options and enable it to see all hidden files and folders.
4) From there, open up Visual Studio 2008 and re-add the group and the controls to your toolbox.I have
For more , please see this article.
I hope this help.
Best regards,
Jonathan
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