Frank, are you still having issues with FF?
To test on iOS I'd have to remember where I chucked the iPod that I confiscated from a mouthy kid last week. I'm more concerned about the fact that Frank can't see submenus in FF.
Maybe the iOS answer is somewhere here?
https://github.com/zurb/foundation/issues/search?q=ios
Or here:
https://groups.google.com/forum/?fromgroups=#!searchin/foundation-framework-/ios
It's very likely less a Flexibility issue than a Foundation issue. Wayfinder does a fine job pulling up the submenus in all the test installs I've mucked with since the Foundation 3 release. Foundation 2 also works well, and it supports IE7. I have a copy of the last Flexibility with Foundation 2 if needed.
There's a box-sizing fix for IE7 available here:
https://groups.google.com/forum/?fromgroups=#!searchin/foundation-framework-/box-sizing/foundation-framework-/aPkZ8KbHcsk/K3Z4yYLiFbEJ
It has some quirks which are being addressed I believe, but it does minimally solve the box-sizing issue for the grid.