I was wondering if I were to post a chapter or two of my novel for input will that cause problems later if it were to be published?
Many forums have a password protected area, so that you can safely upload pieces that you wish to be critiqued. I'm not sure if it's the same on this one, but it's a good question!
I am not being funny when I say this, but reread Cog's welcome post to you. It mentions that posting your work here CAN present issues later on. I believe this matter has been covered, try doing a search. EDIT: I found it! It is stickied at the top of the publishers section of the forums.