Ok, so I added the following code to the file found in templates/gk_coffe/css/k2.css (the bold, red was the line I added)
/* --- Global K2 container --- */
#k2Container { padding:0; }
#k2Container .itemImageBlock {clear: both}
body.contentpane #k2Container { padding:16px; } /* used in popups */
/* --- General padding --- */
and it's still floating some of the images over the text...
Any other ideas? EDIT - It looks like it only happens when the title of the item goes to two lines...