Be Careful With Page.PreviousPage

I found something interesting while testing the website tonight. The new search we implemented was not working on the pages that display house plans. I thought that it was some kind of routing error that could be attributed to the url rewriting. However, closer examination showed that this is the error:

For some reason ASP.Net doesn't like certain nested master pages and will throw this error. My solution was to remove the Page.PreviousPage reference and key off of a parameter value - in this case the value contained in the search box. All that I can figure is that the PreviousPage reference attempts to actually load the page which can result in errors and thus the exception. I haven't had this problem with any of the other pages on the site.

My fix may not be the one I want, but it is fixed.

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