I discovered next problem with MechJeb 161 in spaceplane mode. I made space plane and installed MechJeb module. And i see when I press key "W-S" work pitch and yaw both. Also when I press "A-D" work pitch and yaw both too.
Hello, I reinstall KSP, added Stretchytanks V8, only KSP+ST8. I observation problem with stretch fuel tank. . My friend asked me about it also. Problem only with solid fuel. Just i inserted solid fuel without changes, add pods. And I see black lanch.