I emailed them about it and this is what I got...
Hi,
Here is the MD5 for the latest firmware, please double check if you use the correct:
MD5: 841787772894659804603C02F0E3212B
We have upgraded thousands of S3+ and our tech also double check the testing results. It is no problem.
Sincerely
Janet
I always check md5. Please keep contacting them I give up for now