I received this email from WordPress support regarding the spellchecking problem (‘blog’ is not in their dictionary):
Thanks for the report. We are already aware of that and will resolve it shortly.
Turns out their online support forums already had a bunch of references to the same problem – I thought I had searched for it and come up with nothing, obviously I messed up the search.
My point: They could have said something like, “Yeah, we know, why don’t you search for stuff first instead of wasting our time?” but they didn’t.
Instead WordPress sent me a nice thank you email – fast and polite feedback is a rarity in the customer service world (especially since I’m not paying for anything here!) – big time kudos to them.