The length of Starbuck's hair throughout "Gun On Ice Planet Zero" part 1 is different. Apparently Dirk Benedict got a haircut somewhere along the shoot and it shows up in different scenes.
When Starbuck shoots down a strafing Cylon fighter on the ice planet, the film then cuts to the explosion of the baseship near Carillon, from Saga of a Star World.
The hood of the snow ram, as seen from inside looking out through the windshield, doesn't match the exterior shots. It's obvious that the hood is of a different vehicle.
When Athena checks the computer for crew members who are qualified for the secret mission, there are quite a few typos shown on her computer screen. However, when she prints out the list a few moments later, everything is spelled correctly on the printout.
When the Galactica is scrambling the rest of the pilots to support Starbuck who is in his Viper, due to the stock footage being used Starbuck is also visible in the Pilots Quarters scrambling to get to his fighter.
Ice Planet Zero is described as an asteroid, but asteroids have neither atmosphere nor substantial gravity.
The breathing masks contain some conspicuously contemporary parts of an off-the-shelf plastic model kit: The engine bells of Revell's Saturn V in 1:96 scale.
When a Cylon Raider attacks the Colonial Shuttle and Viper escort, a shot of a computer screen aboard the Viper is in black and white instead of the usual green tint.
After Tenna is first introduced, there is a shot of three of her clones. This footage is actually from the final scene of Gun on Ice Planet Zero Part II but was edited into this scene to sell the concept of her having duplicates.