I have the same problem on my samsung Galaxy 3 GT-I5800 with android 2.2 froyo.
At the beginning everything was well but after finish 3 or 4 level – white enemies… I restart the phone but did not help so i reinstalled the game. First i played classic mode and after few levels the same problem – I thought ok, i can play with white enemies 
– so i continued the game but after next level more and more icons on map become white 
” title=”Neutral” /> weapon icons, menu icons etc. So it looks like this: level 1 – everything ok, level 2 – white enemies, level 3 – white enemies + white weapon icons, level 4 – white enemies + white weapons icons + white menu icons + white commander, missiles… I wonder what would happen at the end. 
” title=”Razz” />
After another reinstall already on first level are white enemies.
Very strange bug. 
Probably only on this phone?