creating a feature with a title that starts with a number causes WSOD

not a big deal, it is not so hard to fix if you know what is going on, but Features should perform some validation when you create a new Feature to prevent names starting with a number. Either that, or strip numbers from the start of machine names before saving.

I created a Feature named 403 Page, and of course all the hook functions created for the export start with the number 4, which php hates, so i ended up with WSOD as soon as i enabled the Feature.

re-exporting the feature as error_403 fixed everything, and luckily it only took me a few minutes to realize what i'd done because the php error came through in Drush, but others might not be so lucky, and be stuck on a WSOD page for a while!