So, I was dying my Guardian Fighter's shield with a Veteran Dye Pack to match her overall blue theme and it looks great, then I selected my sword and selected a Bluefire Dye Pack... and it too looks great in the preview window, however, the 'Change' button won't light up so I can't actually change the appearance of my sword with a dye pack?
Why not? If the preview window will show the weapon as dyed why can't I actually proceed with the dying?
Now my sword looks totally out of place with my dyed armor and shield!
EDIT: Okay, this is strange, now when I try to dye my weapon I get an error in the chat window and at the top of my screen; "Weapons cannot be dyed". However, I totally had a very nicely dyed Ensorcelled Mulhorand Longsword in the preview window! It looked great too!