Re: How do I hide "no-pic.png"? Alter Post Button hover color?
1) I would just create a blank no-pic.png image or use one to your liking. It's designed to put a placeholder there so unless you want to do some custom css and php work, I recommend leaving it there.
2) Make sure you have the .css syntax correct. Also master.css might be overriding your change in blue.css. CSS is a tricky little sucker and much easier to debug if you have something like firebug (a firefox plugin).
3) In the single.php remove the following code
Code:
<div class="alignright" style="margin-top:-19px;"><?php previous_post_link('« %link', __('Previous','cp'), TRUE) ?><?php next_post_link('%link »', __('Next','cp'), TRUE) ?></div>