SplitActionBar & ShareActionProvider leads to a weird weight distribution

[SimonMarquis]

I'm trying to display a splitActionBar with a ShareActionProvider in the middle and two other icons on both side of the ShareActionProvider.

The first display goes well. But after choosing an actionProvider (sms or whatever), when an actionProvider is saved in preferences, the weight distribution goes weird. The left icon is at the same place, but the ShareActionProvider and the right-most button are pushed on the left (about 1/2 cm).

By the way, there is no overflow item or thing like that on the right. ...