Judging from that the fact that it says "server maintenance" I am inclined to say (and am hoping) that it is to fix the 90k & 2002 issues (among others). Hopefully. I was 90k'd during a Praetorium roulette and when I got back, it wasn't displaying any ground effects, not even targeting recticles that show at the base of PCs & NPCs. Needless to say, doing Prae from Nero onwards was an interesting challenge when I wasn't able to see things like plumes, voids, the electrical bad stuff surrounding the edge of Nero.