iChess won't update for free

[davbeck]

iChess (v1.8) is listed as having an update in both iTunes and on my iphone. It says that it is a free update. When I click "Download All Free Updates" or "Update All" I am told that I can't get the free update because I haven't paid for the previous version which I have.
If this isn't a free update than why is it displaying it in the free update section?

 

[laughingperson5]

try doing an individual update?

 

[davbeck]

An individual update works fine for other apps but not for ichess.