Most likely weapons that were given to enemy in map editor before 7609, so they don't have max repair level set correctly.
You can use local mechanics to repair such weapons.

It's not a feature of backpack but feature of 1.13 sight system.
Ja2_options.ini

; Dual welding the longest sniper rifles with full attachements, having a third backup sniper rifle, 
; one combat pack and one backpack will give a 50% (default) sight penalty with the default settings.
COVER_SYSTEM_LBE_EFFECTIVENESS = 50

I can't really seem to understand the camo either. I had one of my IMP mercs wear guillie on head and chest but still only got 5% camo. When I first applied it to him he reached 70% or something but it then decreased to 5% for some reason I can't understand

the only complain with camo is that the displayed bonus is cumulative rather than display the higher camo like it happen on the latest 1.13 builds, but even so terrain camo seem to be applied correctly.
So let's say your camo is 60% you may have 20% wood, 20% desert and 20% urban so your real camo on every surface is 20% rather than 60%
But if you have 60% wood then your camo is 60% only on wood terrain and none on desert/urban.

r7791: Enhancement: It is now possible to view detailed camo information on the map screen (mouse-over popup at the camo value) (by silversurfer)

Training militia is not possible in...

- Training militia is not possible in C1, although you can assign militia to the sector via the city planning.

Also in B1 and D3 (Doran)

@Scheinworld -- I'll get this updated and off to you soonest. Will check all locations.

Don't you have to 'break open' boxes into magazines before loading them? Either way it's not good it's causing that crash.

If you are trying to take the clothes of the enemy you get only his army trousers, cant disguise myself as a soldier but as a civilian.

Talking about covert ops the people on that complex (hale and burton) will get mad if mouse go there at night, but will not attack her.
here is a small example:

Changing TNT into TNT sticks in turn based mode with backpack (all items in the backpack are unavailable because of turn base mode) causes all items in the backup to be dropped to the ground.

Sorry that'll be my mistake trying to rush out attachments with little ref.

@Hawkeye,

no idea about my ESC-Error above?

I made a fresh installation (Ja2Gold1.12 + VR full), but the same if I tried to engage new mercs during the game.

Because of this I load a savegame in the version bevore and tried to engage mercs from AIM or MERC during the game for the first time in the test: ESC-Error!