Critical software flaw restarts UI when trying to remove a user-installed application

Update: These issues are fixed in the Android 4.4.2 update for the GPe Z Ultra, which is rolling out to devices now.

Original story: A second ugly software bug has reared its head in the Sony Z Ultra Google Play edition. Applications installed from Google Play can't be uninstalled — the process instead causes the entire phone UI to restart. This is the second serious bug found in the software on the Z Ultra, the first being no way to open the "Security" section of the device settings, as found by JR Raphael at Computerworld

Both bugs are more than mere inconvenience to the user, and present security as well as usability concerns. This latest bug affects all user-installed apps, and is present regardless of network state. We were unable to test side loaded applications, as access to side loading is currently blocked because we can't get into the security settings.

We can't be 100 percent certain we are running the final consumer build of the operating system, though we have questions out to Google and Sony to get the definitive answer. I've been talking with a few other early adopters about the issue and we've found it to be present on all devices so far. The device is currently available from Google Play for purchase.

We're fairly certain Sony will push an update to fix these issues in short order, but if you've already received your Z Ultra, or it's on the way now, it looks like you'll have some issues to deal with. 

More in our Z Ultra Google Play edition forums.