No syncing/notifications for Gmail and Google Voice

[zipobibrock5e8]

I've got a Samsung Galaxy Tab 10.1 running Honeycomb 3.2. Two of the apps I use often, Google Voice (I use it for SMS), and Gmail aren't auto-syncing or alerting me to new messages. They work fine if I go into them and tell them to refresh manually, and when I do that I also get notifications for the new messages the manual refresh finds.

Settings look like auto-sync is set up correctly, and I've removed any apps like power managers that I thought might be messing with WiFi. Other apps like Hotmail autosync and notify me instantly when I get a new message.

On my iPad and iPhone, Google Voice and Gmail autosync and notify me instantly for new messages, so I know my Google account is set up and working.

Would love to ditch the iPad and use the Tab all the time if I could get this last thing working. Anyone encountered this?

 

[zipobibrock5e8]

No one has any clue about this? It's very frustrating, and makes the tablet much less useful. I've even tried a factory reset and it didn't help. Are notifications and autosync just broken for these apps? For Honeycomb 3.2? For the Galaxy Tab?