Further information.
I am looking at the BB10 file system using Ghost Commander.
After uninstall of Opera Mini 10, there is still a left-over folder (/mnt/sdcard/Android/data/com.opera.mini.native). It looks to be empty, has NO PERMISSIONS SET (r-w-x are empty) and cannot be opened or deleted (PERMISSION DENIED).
Is this the reason for the crash after first run? A folder permissions issue?