Here's the support reply:
Hey,
As far as I can see in your sidebar, some links are really big, and some are smaller. But it seems like there currently only are 2 different sizes, which means that the longer you use the widget, the more the font size will even out. If you have the Custom CSS upgrade, you can add this line of CSS
.wp_widget_tag_cloud a { line-height: 25px; }
To even out the lines so they don't overlap each other. It'll make the links easier to click, but will add more spacing than necessary for sections with only smaller widgets. You can adjust the line-height by changing the pixel value, to for example 20px.
Hope this helps.
--
Isaac
So, I'm guessing that as my blog grows, it should resolve itself... hmmm..