This is just a heads up in case anyone else runs into it. The symptoms are immediate crash on launch for any Unity app (even an empty scene). Hopefully seeing this will save someone the time of reinstalling and checking everything on earth that I just went through 
From Unity:
“We are aware of this issue, which affects only Android non-pro (basic) licensees, together with some versions of the Android OS (typically Gingerbread and later).”
Seconded. I spent all night working on my project only to run into this when I finally get the chance to send it over today. Since I use a modded Nook Color I expect to not have the same level of support the other people have, and assumed it was just the tablet. After many hours I finally created a new demo project and realized that I couldn’t even run that.
I’m re-installing the previous version of Unity at this very moment.
Speaking of which, where can I get a copy of the previous version of Unity?
Thanks for posting this Prime31. I have been stuffing around for the last two days trying to figure out what was wrong, but I agree after testing it is the update.
Well, had the Problem too. Even though I knew it, that it must be something with Unity. Because just a few hours before the update, I compiled the game successfully, after the update it failed. There was no code change and nothing.
I downgraded to 3.4.1 again too. Luckily I didn’t removed the old setup files.
Does someone want to clue me in as to where I can get the old version of Unity? Two of you guys (at least) are keeping secrets 
Who, Android Basic only, I hope they solve it soon !
@Prime31
I guess we have the attitude of keeping the old installers.
On my older Mac I have like from unity iphone 1.5 to the 3.3 in all their step releases (almost all).
Yeah, though for me it’s out of forgetfulness. When I downloaded the latest update I was thinking about deleting all of my previous downloads because of the space it was taking up. Good thing I waited before doing that.
lucky boy
anybody need intermediate versions since 1.5 for the Mac can ask and I will share
We just noticed this bug as well. Like Prime31 posted, it seems to affect only Gingerbread (2.3) or newer since Froyo (2.2) seems to work ok.
Hopefully this is fixed soon.
I have experienced the same problem. I upgraded to Unity 3.4.2 and my app stopped working on Android 2.3.
I have now tried installing version 3.4.1 over the top of 3.4.2 to downgrade Unity but the problem persists although there is now an error message rather than the app dropping out with no message. The error is:
“The application UnityTest (process.com.qualcomm.QCARUnityPlayer) has stopped unexpectedly. Please try again.”
I have just tried completely uninstalling Unity and installing 3.4.1 and still get the same results.
Anyone know what I might be missing or doing wrong?
Or any tips on where to get more information into what is causing the crash?
Does anyone have a link to the 3.4 or 3.4.1 Mac installer?
Awesome! thanks elias_t!
@Elias, how come you are a PC user and download also the .dmg each time 
?
@Prime31 as AppleScript is now broken as iOS 5sdk, how your plugins play now ? Need to make manually import of the frameworks?
I own your iAD plugin, and I was wondering, since OpenFeint suffers this.
maybe cause only extension is different? nevermind
Unless XCode 4.2 has changed the apple script side again, the prime plugins should work without a problem as he, unlike Unity, has had 2 sets of apple scripts for soon a year, to work with xcode 3 and xcode 4
Openfeint doesn’t work cause they don’t have dual scripts, their scripts work for XCode 3 and thats it (might have to do with the longstanding rumor that illegally OF copy pasted it from the UEP which offered it in text form for user to expand it to their needs)
Like dreamora pointed out, we have had separate build systems for both Xcode 3 and 4 since the day Xcode 4 went public.
Oh that’s cool indeed!
I wonder how can we poor Android Basic users play with the new Unity version (many asset store assets require now 3.4.2)
Any chance this issue will be fixed soon ?
@dylski
I downgraded reverted to 3.4.1f5 and I have no issues at the moment.
I see you are using qualcom AR I can’t tell since I don’t use that library.