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ReverseDOS and Community Server error

I got hit by some spammers today and I figured that I’d alter my ReverseDOS.config file so that they wouldn’t get through again.  One of the common things that was in each post was the value [/url] so I added the following to the config.

<filter isRegex=”true” matchCount=”1”>[/url]</filter>

Unfortunately that addition caused the following error when I tried to open any page on my site.

XML Parsing Error: no element found

Not a very pretty error.  I’m not sure why that error is being generated, but it is.  I’m guessing that the [/url] value appears somewhere in the page that I’m receiving.  I removed the filter enter that I show above and modified some of the other RegEx entries which should pick up the spammers the next time.