version 1.0.3 does not fix the column layout

Same problem here, I don’t know if it’s the right fix for you, it worked for me.
I’ve changed:

ul.products li.product:nth-child(4n+1) {
    clear: left;
}

to:

ul.products li.product:nth-child(4n+1) {
    clear: inherit;
}

in the file:
mytheme/inc/woocommerce/css/woocommerce.css

fixed for me, i been looking for ages for a fix for this without knowing it was this. you beauty.

thanks.