Bit of a longshot, but if anyone could help out that would be great.

I have a <ul> in the sidebar of this site:
http://tinyurl.com/6c4fmzr

See the attached image to illustrate what I mean. If you view it in Safari or Chrome (both Windows and OS X) it is not always visible.

When you first visit the site it should show up, but try clicking on the About page, and then click on the 'Home' link. When you do this the <ul> probably won't be visible unless you refresh the page.

All of the HTML and CSS is fully valid and I'm not having this problem in any other browsers.

Completely clueless as to why this might be happening! It is very simple markup too so I don't see what the problem could be.

The div holding the ul is actually there, but it's pushed over to the right of the buttons above it.
Try adding :clear:both to div.blog.

Thanks! I had to use a clearing <br> in the end as simply adding clear:both to .blog didn't work for some reason.

At least it's fixed anyway