My Sharp Aquos LC-60LE632U LED is doing the same thing. Just started for me about a month ago. I play Pandora from the Vudu apps menu. I contacted Pandora, Vudu and Sharp. Sharp support blamed it on Vudu. Couldn't reach Vudu support. BTW, my PC and iPhone Pandora apps work fine. So, it's either Vudu or Sharp. Pandora at least admitted that a "small amount" of users are affected, but they gave no resolution other than updating software to the latest version (which it was). I've done the "super helpful" troubleshooting tips I received from Pandora (see below). No joy. Please post if you figure out how to fix this issue.
From Pandora on 8/4/2013:
Sorry to hear about this. We've heard that this occurs for a small amount of listeners, but we've been unable to reproduce it. The issue usually is specific to the network or to the device itself.
First make sure that your device has the latest Firmware by checking for a new update. If an update is available, try loading Pandora again once the update is complete.
If you're still having the same problem, then please try a few standard network troubleshooting steps:
* Try connecting directly via an ethernet cable rather than wirelessly (if you have this option on your device), and see if it works better.
* Try rebooting your modem and router and restarting the device.
* Try removing and re-adding the app (if this is possible on your device).
You can also contact the manufacturer directly to troubleshoot your specific device and settings.
Hope this helps. Thanks for listening!