We've re-vamped the Store, to make it more user-friendly (and add a few more options):

• Cards you can buy for Credits
• Bundles of Smart Packs and Drafts
• The ability to buy Credits and NanoBots for Gems
• More visibility into the Mega SmartPacks/Credits/Gems - you can see how long you have left, and can even re-buy them before the timer runs out (if there's less thna 14 days left, you can re-buy). The additional days will stack.
• More purchase options visible
• Some true special offer bundles, which are one-time purchases that unlock at various different levels (if you're already beyond that level, you'll see a bunch of them in quick succession, so you won't miss out)

Feature Improvements:

• Lots of general polish & UX improvements
• Relaxed the server timeout even more, to minimize false positives
• Added audio in some obvious places
• Improved performance of cardlist items on low-end machines
• Improved display of Store objects

Bug Fixes:

• "Random" effects now play their FX on the same unit that they affect
• Less chance of cards being initialized with incorrect art
• Losing a practice match in draft now no longer kicks you out of the draft
• Quests now show the correct art