Wordpress - Insert code (clear both) between every 2nd post?

[figment]

Hi Guys,
I am working on this site: Beautiful Email Newsletters
There is a problem with some posts dropping down causing gaps on the page.
To stop this i am thinking i should insert a DIV with a clear: both; style between every second post. Is this possible and how?

 

[louie]

You can sort this out by playing with the image height and width.
Also find the loop and start counting using "row=0; than row++".
When you get to "2" reset counter to 0 and add the clear:both div.