Tried to update from 18.1 to 18.2 just now and it failed.
=> Firmware upgrade step 1 started:
Search firmware version information for 5big1 ...
The latest version available from http://plugout.net is: fvdw-sl 18.2
Check free space on system partition ... OK
Get the bound upgrade files list
Retrieve the firmware package
Try to download part 1 on 5...
Attempt 1: OK, got successful the firmware package part1 file
Try to download part 2 on 5...
Attempt 1: OK, got successful the firmware package part2 file
Try to download part 3 on 5...
Attempt 1: OK, got successful the firmware package part3 file
Try to download part 4 on 5...
Attempt 1: OK, got successful the firmware package part4 file
Try to download part 5 on 5...
Attempt 1: OK, got successful the firmware package part5 file
Extract firmware package...
OK, extract successful the firmware package
Retrieve kernel image file for 5big1...
Attempt 1: OK, got successful the kernel image file
OK: Retrieve the latest firmware image file successful
=> Firmware upgrade step 2 started:
Firmware package uploaded via fvdw-sl server
package type: new configuration (version > 16.1)
firmware image type: extended file system (version > 17.0)
Check firmware files archive ... OK
Detect family type... OK
Check kernel version... OK
Check DATABASE file... OK
Check active partition... OK
Install new common firmware files on /dev/sda1, ... Fail
can not mount the new system partition
I tired it more times and it do not success.