The Problem is this Text 'H&M – Fashion Against Aids', while every other Box has only one Line at this point, this Box has a doubleline there and i think it is just rendered 1px biggen than in the older version.
The result is that this box is 1px bigger and according to that the next box is not starting from the left side, but in fact from under the second box column.
You need to change this
.case-thumb {
min-height:300px;
}
to this
.case-thumb {
min-height:345px;
}