Allison Tarr

What theme are you using?
Have you added any new plugins recently?

Did you edit your php files at all?

Something is happening around line 74 of your wp-settings file. Sometimes it can be something as small as ‘white space’ before or after your <?php ?> tags. (see http://stackoverflow.com/questions/8028957/how-to-fix-headers-already-sent-error-in-php for some dense reading on this)

It is possible that their site is set up with a different code organization (categories versus taxonomies, etc.) or that their theme offers different archive display options.

What theme are you using?
Do you have a link to where it is live?

Do you have experience with CSS? Right now there’s a float: center placed on that h1, which isn’t a valid CSS property for ‘float’ (https://developer.mozilla.org/en/docs/Web/CSS/float). You could do text-align: center?

If you’re not using a Child Theme, and if the theme doesn’t have a designated section of the dashboard for CSS modifications then do the following:

• Install this Custom CSS Manager plugin http://wordpress.org/plugins/custom-css-manager-plugin
• use its “CSS Code” section of the dashboard to hold your CSS modifications
• (put your CSS code in)
• Save

For me, your logo is centered and there isn’t a grey background on your nav, so I’m assuming you got this sorted?

I’m not quite sure I follow what your intended goal is when you say a scrollbar inside a tab. Do you have a link to an example of what you mean and the site you’re working on?

Are you using plugins at all?

I would recommend starting by creating a backup, then disabling your plugins and testing them one by one to see if there is a conflict that could be affecting your media gallery.