Well, we know that glyphs aren't pure random - fireball is always on the map. It's possible, that set of glyphs is randomised some way like items in the shop.
GETINDARE ("always first strike"-bug!?)
Lately i experienced some problems with that spell. I died some times trying to finish an enemy with that spell. Anyone else? 20:39, 26 July 2010 (UTC)
This is commonly caused by attacking a goblin or medusa which GETINDARE intentionally doesn't work on. You should probably try to come up with a better bug report than "it happens sometimes".