I also did an update on my Z6tv. Only i used the Motorola Software update from the Motorola website. I was using a 2gb SD card in my phone then I did the update and now it only supports the 1gb SD card. I spent an entire day with tech support with Motorola and Verizon. Finally I was able to talk to a tech support superviser at Motorola. I pointed out that on the Motorola tech support website the phone shows support for 1gb SD card. Then on the Motorola product page for the Z6tv it shows support for a 2gb SD card. The superviser gave me the corporate address to file my complaint. I urge you to do the same.
Motorola Corporate 1307 E Algonquin Rd 2nd Floor - Customer Care Schaumburg IL 60196-1081