Bug: Losing a single-player game for no reason

[NTJedi]

UhhhClem said:
The last message in my turn report told me that I was defeated.

The battle you mentioned has nothing to do with this message. Since you mentioned your position in the game was fairly strong I don't think you died from loss of dominion unless you completely ignored the idea of building temples. If you were strong and building temples then it's my opinion you lost the game because a computer AI won because of a specific victory condition such as 'victory points'.