My app has been in the play store for a while, and it worked.
Yesterday I released an update, and found a bug in it, which I want to fix today.
After uploading my alpha apk to the publisher page with a new version and versioncode(so I can test purchases), in app purchases do not work in this new version.
I did not change any code related to in app billing.
I'm using v3 of the iab library.

I get this error message:

> 
> 01-16 13:15:34.365: E/Parcel(707): Class not found when unmarshalling:
>  com.google.android.finsky.billing.lightpurchase.PurchaseParams 01-16
>  13:15:34.365: E/Parcel(707): java.lang.ClassNotFoundException:
>  com.google.android.finsky.billing.lightpurchase.PurchaseParams 01-16
>  13:15:34.365: E/Parcel(707): at java.lang.Class.classForName(Native
>  Method) 01-16 13:15:34.365: E/Parcel(707): at
>  java.lang.Class.forName(Class.java:204) 01-16 13:15:34.365:
>  E/Parcel(707): at java.lang.Class.forName(Class.java:169) 01-16
>  13:15:34.365: E/Parcel(707): at
>  android.os.Parcel.readParcelableCreator(Parcel.java:2091) 01-16
>  13:15:34.365: E/Parcel(707): at
>  android.os.Parcel.readParcelable(Parcel.java:2055) 01-16 13:15:34.365:
>  E/Parcel(707): at android.os.Parcel.readValue(Parcel.java:1971) 01-16
>  13:15:34.365: E/Parcel(707): at
>  android.os.Parcel.readMapInternal(Parcel.java:2255) 01-16
>  13:15:34.365: E/Parcel(707): at
>  android.os.Bundle.unparcel(Bundle.java:223) 01-16 13:15:34.365:
>  E/Parcel(707): at android.os.Bundle.getString(Bundle.java:1082) 01-16
>  13:15:34.365: E/Parcel(707): at
>  android.content.Intent.getStringExtra(Intent.java:4945) 01-16
>  13:15:34.365: E/Parcel(707): at
>  com.android.server.am.ActivityStack.startActivityLocked(ActivityStack.java:3745)
>  01-16 13:15:34.365: E/Parcel(707): at
>  com.android.server.am.ActivityStack.startActivityMayWait(ActivityStack.java:4961)
>  01-16 13:15:34.365: E/Parcel(707): at
>  com.android.server.am.ActivityManagerService.startActivityInPackage(ActivityManagerService.java:3433)
>  01-16 13:15:34.365: E/Parcel(707): at
>  com.android.server.am.PendingIntentRecord.sendInner(PendingIntentRecord.java:254)
>  01-16 13:15:34.365: E/Parcel(707): at
>  com.android.server.am.ActivityManagerService.startActivityIntentSender(ActivityManagerService.java:3325)
>  01-16 13:15:34.365: E/Parcel(707): at
>  android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:258)
>  01-16 13:15:34.365: E/Parcel(707): at
>  com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:2122)
>  01-16 13:15:34.365: E/Parcel(707): at
>  android.os.Binder.execTransact(Binder.java:388) 01-16 13:15:34.365:
>  E/Parcel(707): at dalvik.system.NativeStart.run(Native Method) 01-16
>  13:15:34.365: E/Parcel(707): Caused by:
>  java.lang.NoClassDefFoundError:
>  com/google/android/finsky/billing/lightpurchase/PurchaseParams 01-16
>  13:15:34.365: E/Parcel(707): ... 19 more 01-16 13:15:34.365:
>  E/Parcel(707): Caused by: java.lang.ClassNotFoundException: Didn't
>  find class
>  "com.google.android.finsky.billing.lightpurchase.PurchaseParams" on
>  path: . 01-16 13:15:34.365: E/Parcel(707): at
>  dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:64)
>  01-16 13:15:34.365: E/Parcel(707): at
>  java.lang.ClassLoader.loadClass(ClassLoader.java:501) 01-16
>  13:15:34.365: E/Parcel(707): at
>  java.lang.ClassLoader.loadClass(ClassLoader.java:461) 01-16
>  13:15:34.365: E/Parcel(707): ... 19 more
> 
> 
> 

I get it when the buy intent is called.
Error message on ui is:

> 
> This version of the application is not configured for billing trough
>  Google Play. Check the help center for more information.
> 
> 
> 

I have tried it on different devices, with the same result. Old versions of the app still work.
Yesterday it worked perfectly.

Should I just wait for google play services to get the info that I have a new beta update? I'm guessing that the update did not reach my devices yet.

edit:
I've uploaded 3 versioncodes as betas to publisher site trying to fix this, and now the previous one works. So I guess I really just have to wait. :(