There is a bug in 1280x1024 version where TURN/COMBAT buttons doesnt work.
For a fix, rewrite the following code in faction1024x768.ini
IntCombatTurnPicDn=ENDTURND.bmp
IntCombatTurn=11 101 39 114
IntCombatEndPicDn=ENDCMBTD.bmp
IntCombatEnd=45 101 82 114
with
IntCombatTurn=1230 70 1280 90
IntCombatEnd=1230 90 1280 120
The instalator will be fixed probably with next interface update.
Thx to Dziubek and Leim for bug report. Keep them coming!