Opera continues to work on improving its alternate browsers, most recently releasing a versions of Opera Mobile for Android containing an assortment of bugfixes and security improvements.

Opera Mobile 11.1 update 2 tightens-ups the security of the browser's cache files.

Update contains a fix for a security issue, with thanks for Roee Hay of IBM Rational Application Security Research Group for reporting; Apps on Android are supposed to be isolated, so that in general, they cannot access files belonging to other apps.

This is a security feature of Android that is intended to provide some level of protection against malicious apps, preventing them from being able to modify the behavior of other apps. via Opera