Because the new images uses the latest kernel Version 3.1.1 the bootloader of the Solo & Duo most be updated.
Here is the bootloader for the Solo.
After the bootloader update the latest image with kernel 3.1.1 can be used.
* UPDATE AT YOUR OWN RISK *
The CFE image of Vu+ Solo is updated.
The main difference from the old one is supporting the large size image more than 48MB.
Please see the detailed explanation of update as below.
Unzip the cfe_solo_2.0.zip to USB stick. (There should be /vuplus/solo/cfe_cfe_auto.bin)
Insert USB stick into the USB port of solo and power on the box.
It takes just a few secs to update.
If solo's front led blinks continuously, restart box.
To proceed with image update, you should delete the cfe_cfe_auto.bin at /vuplus/solo in USB stick once bootloader update is finished.