Darnon

I removed the .pngs from the Leek folder and it fixed the loading hangup for me. They only appeared to be a 2x2px white image so possibly they corrupted in some fashion? (ATM here as well, FWIW)

The issue with TGA vs PNG is that KSP also loads that data into system memory and, as was discovered with the FusTek Station Parts Expansion Pack, the compression does matter there. Video cards seem to handle the texture data well enough regardless of size, but the 3.7gb RAM limit KSP has to work with is a bit more unforgiving if you're running a number of parts packs.

The plan I had for using the debug mode was to have the option of launching from the alternate KSC that is otherwise unusable.

Is the debug flag no longer used? Setting it to true still requires resources to build craft.