While many users would love for the Xperia X10 to get Android 2.2 on their X10, with some users even signing an online petition. It appears that 2.2, for now at least, isn’t as good as it could be. That is, if you have the developers version anyway and have installed it on your handset. Which likewise, many X10 owners would love to do.

It appears that users who have upgraded to Android 2.2 using the developers version, instead of the handset specific version when released, is causing some apps to not appear in the Android Market. NYTimes, Epicurious, Calorie Counter and FlightTrack are missing from the Market Place since upgrading. However if you had the app installed before hand, it should continue working. Other users are reporting that they are unable to install apps purchased prior to the update, due to an option called “Forward Locking”. App developers may add this to prevent the apps from being copied, as well as disabling the app installing ability for developer or unreleased versions of Android.

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