Are You experiencing bootloop [on-off] every time when you plug-in your phone to the charge when it is switched-off... ??
This problem may have occurred after rooting your Mini Pro on Ice Cream Sandwich ?
Solution to this problem :
 Download and extract the Charger.zip file in the attachments.
 Copy the extracted charger file to your phone SD card.
 Use X-Plore or Root explorer to copy the charger file on SD card to system\bin\ [Just Replace It] on phone memory.
 Done ! No Need to reboot..
This Method has been tested on my Xperia Mini Pro and its working !!
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?