A couple of times I have come across a member's post with this problem:
Spoiler for screenshot:
To fix this problem a total of 6 files need to be unpacked from the default\main game:text\shared.txt.strings.bin
text\strat.txt.strings.bin
text\tooltips.txt.strings.bin
ui\battle.sd
ui\shared.sd
ui\strategy.sd
While I have described in another tutorial how to unpack individual files this can prove to be a cumbersome affair for the casual user\player. To remedy this I have put the required files into a simple installer - just follow the instructions (usually a click through affair).
Link to the installer here at TWC.