Posting information on this site

I am wondering if any one else has the same experience that I do when using this site to post information in response to a posted question. When I post in response to some of the queries the system seems to behave normally and I immediately see the page with "New Response Posted Thank You" On other queries I get "500 - Internal server error. There is a problem with the resource you are looking for, and it cannot be displayed." That leads me to believe that my comment has not been posted. But if I close the browser. Open a new window and look at the All Forums page and then click onto the query I posted the commit to I see that my post is actually there. I am wondering if any one else experiences the same phenomena.