looks like the list of problems with the latest WooCommerce update is not yet complete...
With the latest Abundance 1.2.1 and WooC 1.4.1 I can not add product attributes any more. Actually I can, but they just disappear into the digital nirvana or somewhere in the database where they are not found afterwards - do not show up on the list. Editing existing product attributes has hickups as well.
Looks like Woo did nice work to discourage using other themes with their plugin, lol - but I am sure you guys will get this fixed soon. :)