I am having some issues with the forum. I grabbed the most current daily build and when I post a topic, the url it goes to after posting is: /general-discussion/flat/1?showPost=1 however, this does not show anything but a blank page. Any ideas on how to fix this or what could possibly be happening?

is there any error listing in your php error log file?

Where would I find the errors to check it? From what I can tell there are no errors or anything.
I also found on the forums this thread talking about the same problem, with no solution ever posted: http://silverstripe.com/site-builders-forum/flat/107934

I am sort of confused on where to go next...

yes it has come up before and I have managed to debug it but your PHP log should give you an idea of where its going wrong.

If log_errors = On is turned on in your php.ini file then it should right to a file called /logs/php_error.log somewhere. Are you running on a local server or a web server?

Its running on a web server, and logging is turned on, but there are no errors being shown

dumb! well without an error or anything to go by you might have to do this the slow painful way. If you have any clue about PHP you could try digging though the methods in Forum.php - where it posts the new thread and just insert die() or Debug::show() statements thoughout the postAMessage() method to see where its going wrong.

You might want to check the following settings in php.ini

error_reporting = E_ALL
display_errors = On
display_startup_errors = On

This will get the errors outputted to the web-page, which isn't recommended for production sites but it helpful during development.

Turns out it was some sort of issue with my hosting provider. I changed everything over to one of my other hosting accounts on a different provider, and the Forum works wonderfully. Thanks for the help on trying to figure it out.