A dirty open secret about Twin Blades (see our review), even after it returned to the Marketplace, was that it didn't work on phones with Windows Phone 7.5--it literally would crash upon launch. That made it the first (and to our knowledge only) game/app that would completely die in Mango.
Now with version 1.3, all of that seems to be behind us as the game now works in Mango. We say works in Mango but it is not, we repeat not Mango-ready. Yeah, super lame. No fast app resume here folks. Although a somewhat repetitive game, it's well worth a trial run and you can grab that here.
[Correction: Hey, look at that. For some reason our fast-app resume was not working but now it is. So yes, looks like Twin Blades is Mango ready--so that's something.]
Likewise PAC MAN CE DX version 1.1 got updated but there's no clear indication of what was fixed, so we'll have to try to find out for you. You can pick up that game here--and as far as Pac Man games go, that one is pretty great (see our review). But at $6.99 and no fast-app switching, ouch, we think waiting for a deal-of-the-week may be apropos here.
We're reaching out to both companies to try and pry a full change log from their hands and will post if there's anything significant regarding achievements or bug fixes.