Looks like it's not We're not sure if it's the Flash update that does it - that was just a coincidence for Brian and utcarbs (update: And Bateluer in the comments). We're also not sure which phones this is affecting... I've tried updating Flash on my EVO, as well as uninstalling and reinstalling, to no avail. --Aaron
Update #2: As I expected, this is definitely not related to Flash. I updated Flash yesterday and didn't get the new tab. Today, I updated some random programs and the tab showed up. I'm pretty sure the Market UI is server-side, so checking the Market app's version does not help (my /system/app/Vending.apk is 1.82).