Home page posts overlapping

Theme Name: Sampression Lite Version: 1.5.1

Chrome Version 34 (mac, same issue on pc though)
Safari Version 7.0.3 (9537.75.14)

In out-of-the box setup, on home page in grid layout, posts overlap other posts and #sidebar. On initial load, no overlap. On refresh (once cached) they overlap. Resizing/sizing browser window fixes issue – posts realign with proper spacing.

Tried on two installs (two different sites) – same issue.

I looked at older posts and found this js fix, but it does’t resolve the issue:
jQuery(document).ready(function() {
setTimeout(function(){jQuery(window).resize()},2000); // This triggers window resize 2 seconds after dom is ready
});

http://mulchandhammer.com