8/11/2012 3:33:40 PM
RE:Potentially dangerous request.path
Is seems that you are using such link somewhere in your web site which is not correct and user clicked on such link, and it throws error message. For example in case query parameters of some url are not encoded.
Do you know how to reproduce this issue on your web site? It is also possible that somebody (some bot) was testing your site. In this case the above message in the event log would not be harmful and the system reacted correctly.
It would be better if you tried to find which link/url generated above message instead of disabling request validation.