I got, since yesterday patch, a strange bug. I wasn't able to find any topic about it.
On the last OB, without any mods, when I start, as SP, a mission with "client slot", both from the ME, or directly the mission menu, I cannot choose anymore a slot. The "Choose a slot" item in ESC menu disappeared.
I tested with my own mission, saved on previous OB, the MP Coup d'etat M2000 mission from BalticDragon, or even a new one with only 2 A10C as client in ME. Tested on Caucasus, NTTR and PG.
Ps: I gonna try a repair (again)