User @inconnux made a small summary of what he tested beta 2.5.1 It's interesting if he says he confirms the Xecuter team. Find the article in the link below. Thx !
"First, thank you for the news of the SX OS 2.5.1 (I have just myself to test this version)
Then I give my opinion.
My personal opinion (after everyone is free to give his own opinion respecting all the opinions of others):
The SX version of OS 2.5.1 BETA come out, I just test my mods working properly under OS 2.4.1 BETA SX that no longer works in OS 2.5.1 Beta SX.
Let me explain, under OS 2.5.1 BETA SX, OS act like my mods does not exist. It starts the game normally out that I have put my mods on the micro SD card. So in my opinion, his was not correct ...
Then I also test SX OS 2.5 BETA with my mods but the game screen remains black its not working either, so I say too bad so stay SX OS 2.4.1 BETA.
Conclusion: He wanted to fix the bug with layeredFS for me is to fail!
So here are the improvements according to Team Xecuter for the SX version 2.5.1 OS:
Here are my answers :
Compatibility Fixes with LayeredFS " LIAR! Why not his march to my games?"
It seems that we have introduced a regression in the care of "LayeredFS" in version 2.5.0. This affected some mods of the game, such as translations of fans. This has been found and corrected! "I HAVE MY WELL PUT ON MY MICRO SD MOD AND ME GAME LAUNCHES NORMAL AS IF THE MOD DID NOT EXIST! THIS IS NOT NORMAL ..."
Internet game improved local wireless "I HAVE YET TO TEST" Many stability fixes and improvements were made to the Internet feature local wireless play.
Fixed the message "corrupt" false positive for the installer. "I HAVE NOT UNDERSTAND THIS STORY OF FALSE POSITIVE FOR THE INSTALLER" The Switch software management menu offers an option to verify the integrity of installed titles. When using this feature with titles installed via our DK installer, you still receive a message indicating that the data of the title are corrupt. It was mostly a false positive because the installed titles worked fine .. but we have investigated the cause and correct the aesthetic gap for all new installations!
Added support for the installation of XCI
You read that, from now on, you can also install * * titles to XCI format as you would for any content at NSP format. This is useful for people who want access to all their games from the screen of the home menu instead of browse our menu. Of course, you can always read the XCI titles without installing! "WOW, ITS REALLY IS SUPER. .XCI OUR CAN BE USED AS A DÉSORMAIT .NSP IF I UNDERSTAND FOR INSTALLATION"
Conclusion: .XCI is my ultimate size has meaning for backups Switch (it can be used as a .NSP so it can be installed directly in our backup switch) and .XCI can be run without install we 2 choice. Mouahahah the .XCI the triumph .NSP (after it's my own opinion)
All this was my personal opinion, I use too SX OS after you free and have the right to agree or not with me

Enjoy those well under SX OS 2.5.1 on my side I stay SX OS 2.4.1. In anticipation of a future version of SX OS that will fix this bug for real."
Original Source : http://www.logic-sunrise.com/news-1035841-switch-sx-os-251-disponible.html