Check the Formatting Configuration in your Theme Options Panel. By default, WordPress® comes with several Formatting Filters built into its publishing system. Advanced users may find them annoying, particularly if you already know XHTML and you're not using the Visual Editor for WordPress®. These Formatting Filters include: wpautop, balanceTags, wptexturize, convert_chars & convert_smilies. The most important Filter is wpautop. It converts double line-breaks in your content into paragraphs (<p>...</p>). The other Filters, well, they do a few different things, but for the most part, they're responsible for keeping your code clean, handling XHTML entity conversions for special characters like ampersands, and balancing the overall structure of your code. All of that being said, if you plan to write your own XHTML, without the assistance of the Visual Editor, you can safely disable these Filters to prevent your raw code from being modified by them.
Broken Content: If you've already created Posts/Pages using the Visual Editor for WordPress®, disabling these Filters can cause your existing content to appear broken. For example, the wpautop filter converts double line-breaks in your content into paragraphs (<p>...</p>). So, if you've already published a lot of content that depends on automatic paragraphs, and then you disable wpautop, your content will become jumbled. Just keep this in mind if you disable these Filters, and then find your content in a mess. It is easy to think your theme is to blame, when actually it is just these Filters at work, or not at work. In either case, the problem will be temporary, not permanent. To correct the issue, adjust your configuration. I've attached a screenshot.

With any theme, including ours, you can only generalize the CSS styling for widgets. There is no way to pre-determine which widgets you may decide to use. Sometimes, widgets you download from the WordPress.org site will come with their own CSS style sheets or specific rules, and sometimes they will not. The bottom line is that if you decide to use non-standardized widgets ( those not included with WordPress® by default, or with our themes ), then you will need to create your own CSS rules and style them yourself, so they jive with your overall layout. Some widgets will be too wide, others too narrow, and others just look funky. Check the documentation for each widget you're having problems with first, and if all else fails, use your Theme Options Panel to add Custom CSS rules that address your concerns.
No. If you don't want to use FeedBurner®, you can just fill the FeedBurner® options panel with URLs pointing to which ever locations you prefer. That being said, there really is no reason NOT to use FeedBurner®, as it provides additional features not available with WordPress® alone. Such as email subscription capabilities, advanced statistics, syndication methods, PingShot, BuzzBoost, the Awareness API, FeedFlare, their Headline Animator, and the list goes on. FeedBurner® also makes it possible for you to run AdSense® ads within the output of your feed. I've attached a screenshot.
