2 things I've spotted which you'll be interested in, I hope.
Same behaviour in both Opera (latest) and Chrome (latest) - not tested in any other browsers.
1. All Products list page. Hover your mouse over the gold star in the column header (or column footer) - causes immediate change of grid layout. A new column appears called 'Type' but is not sortable. Other vestiges appear - columns squash towards the left and column header/footer 'body' disappears towards the right, presumably as a result.
2. Jigoshop > Settings > 'Pages' tab >'Permalinks' section.
The advice text which appears when hovering mouse over the help icon for the "Prepend shop categories / tags with base page" field, appears to have got the Yes and No results mixed up - unless I'm completely missing the point!
3. Jigoshop > Settings > 'Catalog & Pricing' tab > 'Pricing Options' section. Note that there help icons for every field in this section are not displaying any advice text when mouse hover over the help icons. The same is true for several fields in the 'Products & Inventory' tab, product options sections (all but the top one). Not sure if this is intentional. Same also for 'Shipping' tab and shipping options section.
Cheers & keep up the outstanding work.