The Secret Glyph Project have been hard at work and have figured out what was causing the doors in Sector 8 to disappear (see The ODST glyphs *DO NOT* unlock a door!” and Confirmed: ODST door disappearance is a glitch) and got in working in other sectors!

They’ve wrapped it up nicely in this Youtube video which servers as both a demonstration and tutorial.

For detailed information on how to repeat it and how it works check out their discussion forum and get “bumping”!