False positive for my application

One of my users has reported that avast! flagged my app, “Compufart FREE: Fart Synthesis” as malware. This seems very unusual as the only thing the app does that could be construed as suspicious is reading/writing preferences. Please let me know that something can be done about this.

The app can be found here:
http://play.google.com/store/apps/details?id=com.audolon.millenium.free

it is good to mention WHICH detection it is, thank you.