The limited number of supported Android handsets shown on the Spotify web pages is disappointing.
In addition, claiming to not support newer versions of Android, while still allowing it to show in the market is weak.
Many phones and tablets will be upgraded to Android 4 / ICS in the coming few months and your user base, many of which will be unable to stably use the mobile client, will be quick to complain and may start moving on.
Please bear in mind that the Community is not an official Spotify support service. It's a place where we all help each other, whether we work for Spotify or not. So please use your discretion when using the forum.