It looks like the "Chances are..." result text in the Military Units selection window is not being refreshed automatically.
Steps to Reproduce
0. On the Map screen, immediately after creating PC and NPC:
1. Select "Explore 12,4" -> Military Units selection window appears with 0 units selected; "Chances are poor..." text displayed.
2. Select 5 military units using slider.
3. Select 12,4 hex on map again -> Green silhouette hex appears at 12,4 hex; text is now "Chances are excellent (94%)..."
4. Close Military Unit selection window.
5. Select "Explore 11,4" -> Military Units selection window appears with 0 units selected; text still displays "Chances are excellent (94%)..." message.
6. Select 11,4 on map again -> Green silhouette hex appears at 11,4 hex, text changes to read "Chances are excellent (97%)..."; still 0 military units selected (selecting 5 with slider doesn't change "Chances are excellent (97%)..." text.
Running AHD v.5992 on MacBook Pro OSX 10.5.8