TODO:
Have you ever wanted detailed errors to be returned from your Sharepoint Application Pages? Selecting "Detailed Errors" in IIS will not do it alone. In addition, you need to do the additional step below.
SOLUTION:
Open the web.config at "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\web.config"
Change <customErrors mode="On" /> to <customErrors mode="Off" /> under the system.web node
NOTES:
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