blips and skips

The first thing to try in this case is check your firmware build, to see if your Sansa has the latest version installed.

On the device, go to the Settings menu, then scroll down to the Info  selection.  The current version is 01.01.20.  Here is the firmware information thread for  the Clip Zip.

You can either install the firmware manually, or follow the link in the thread for the Sansa Updater application. After installing the Updater, simply plug in your Clip Zip, and if an update is needed, it will update the device automatically just follo the on screen instructions).  Manual updating is a simple task as well, simply follow the instructions described in the thread.

microsansa