C4Eva reported on IRC he completed a Livelog on the new dashboard and it should be safe for modified DVD firmwares (iXtreme v3 or v2.x for non-AP25 drives):

[c4eva] Livelog complete on new dash! No changes, same checks, safe!
[c4eva]

[y****] does burnermax mess up the drive for non xbox burning or reading?
[c4eva] no
NOTE: While the new dash seems safe for CFWs, it does however currently make the RGH impossible. But people are working on a solution and Team Xecuter already announced they will probably have a fix ready for SLIM consoles soon.

http://www.xbox-scene.com/xbox1data/...plBMHyNyPF.php