PrestaShop subcategories not visible in blockcategories

PrestaShop subcategoriesAfter upgrading to PrestaShop 1.5.3 (and 1.5.4) the subcategories where not showing up anymore in the categories block. The solution was quite simple: 

Just deinstall the categories block in the modules section and then install it again. After reinstalling, it will probably be necessary to adjust the block position. 

Timelapse from space