Hi Iain I have a 64gig Ipad 4 3G on latest IOS (7.1?). To be perfectly honest I uninstalled this after buying Panzer Korps so couldnt tell you exactly what stage it is, only that its in the first expansion pack after the second or third mission. Every time I go to play the mission it reset either before the loading / objectives screen or immediatly as the game map displayed.
Sounds like a UI design decision that Apple would never make. Anyway have the fonts been made bigger yet. If so I'll repurchase the game. (I had deleted it and got a refund)
There is an update in approval with Apple that should fix the font size issues. I expect it to release next week.