After receiving reports of VGB-Android 4.1 not being able to restore saved states, I have found a bug, accidentally introduced when adding MMM01 mapper support, that affected state restore process. I have just released the bugfixed VGB-Android 4.1.1:

https://market.android.com/details?id=com.fms.vgb

If you are a VGB user, please, upgrade as soon as the new version becomes available from the Google Play Store. If you are still unable to restore from a previously saved state, reset emulation by selecting "Reset" from the menu. Sorry for the trouble: these things happen now and then.