BrotherBloat

it's firespitter core that clashes with MJ -900 currently. Removing it is a bit tricky, as many mods depend on it. But I depend on MJ more the version number is indeed regressed, but it is indeed the newest build and it runs well with 1.8, as long as you don't have firespitter core

I LOVE YOU! Removed Firespitter core (sadly needed for Malemute and USI exploration pack) and voilla - MJ -900 starts like a charm

this is fixed in -900 release

same on my main machine - just hangs on 'Loading Expansions...' after all 80+ mods have loaded (though I don't have MH or BG). However, it looks like some other mod is not playing ball, because my laptop loads up just fine - with only KER, All'Y'All and MechJeb 2.8.3.0-900 installed on KSP 1.8

that's fantastic news! you guys work fast! sadly, my environment loads fine without MJ2 #899 (or 898 or current release), but with either of them, it fails to load the menu (after all mods are loaded). I'll wait patiently for more mods to become updated and perhaps for a new build here. Thank you once agian for the amazing and timely work!