Why do the icons on the device look different after I update Xperia Home?

Due to an issue related to the icons used by the device’s themes, the icons on the Home screen may suddenly be displayed differently after Xperia™ Home is updated.  For example, square app folders may be displayed instead of rounded app folders. To solve the issue, follow the instructions below.

To restore how icons are displayed after updating Xperia™ Home 

1. Touch and hold any empty area on your Home screen until the device vibrates.
2. Tap Themes.
3. Select the theme that you were previously using.