Since the glyph shapes are based on constellations, wouldn't the Milky Way constellations be a totally different shape, if even existent at all, in the Pegasus Galaxy? Assuming this is the case, which glyphs are used in the puddle jumper DHDs and how can they work in both galaxies? The buttons on the jumpers look like they are real buttons with labels that don't change (vs. touch screens). This (different glyph shapes) can be extrapolated further on the stargates planted throughout the various distant galaxies on Stargate: Universe.
I'm not talking about stellar drift over the millennia which is essentially dealt with using automatic periodic software updates to the DHDs. This has been addressed in the first season of Stargate SG-1.