I'm also having this... I tried to do it over Wi-Fi just a minute ago - Also BTFON and Flash Player 10.3 won't update :/ Seems very wierd

 

You must have enough free space in the /cache partition for the app to download. One thing to check is download "quick system info" and see if the free space is smaller than the app.

 

I think you misread my post. Please read it again and follow the steps I said. Then feedback please. Thanks

 

Are you rooted?

 

Hmm. I know how to do it on a rooted phone. I'm not sure it will work using adb on an unrooted phone, but you can try it.

Firstly follow the red link in my sig to locate the adb & fastboot FAQ.

Follow it to set up adb on your PC>

Boot into recovery on your phone (from off, vol down+power, then highlight recovery using volume and select using power. Then Vol up + power. connect to PC using USB).

Then get into adb shell (explained in FAQ)

then the following command:

mount /cache

followed by

rm -r /cache/download/*

I honestly dont know if this will work without root. I'm guessing not, but since I havent got an unrooted desire to test on, I cannot be 100%

Other than this I really cant think.

The only thing I know for sure that will erase cache is a factory reset.

You could always download visionary+ (google it) and temp root your desire (lost at reboot, doesn't affect warranty) then do a full backup with titanium backup. Then reset the phone, temp root again and titanium restore. That way you lose no data or anything...

Its a tricky position to be in.