The font size for the three icons at the right of each item is set to 20px. It would normally default to 14. 20 is too big. It makes the icons nearly overlap, and in a two-column setting can result in the icon bar not displaying properly. The default of 14 looks better and doesn't have the problem in 2 columns. The line-height also seems unnecessary now.
Also, with a 2-col setup with a subpage button at the bottom, the item is split. At least by Safari. I think it would be best to specify no splitting within all item types except text.