I had the same problem on a hosted site. I had to make sure that php was running as an apache module, not as cgi. That fixed it for me. But I don't know if that's what is causing your issue.

http://forums.b2evolution.net//viewtopic.php?t=4849&highlight=extra+path+info

did you rename the sample .htaccess fiel to .htaccess? And if you're using Apache2, then uncomment the last line, too.

personman wrote:

did you rename the sample .htaccess fiel to .htaccess? And if you're using Apache2, then uncomment the last line, too.

It was the last line of the .htaccess file, I had left it commented Thank you sir, problem fixed.