I was having some layout issues (printing) with my form. 2 views.
So I decided to recreate the views from scratch.
View 1 (default) = Supplier Copy
View 2 = Customer copy
Created a new view called Supplier and recreated from scratch.
Created a new view called Customer and deleted the default blank layout and pasted the contents of Supplier to customer. Then a made a couple of textual changes necessary.
All looked fine, saved, quick publish. Went into code view to make sure nothing referred to view names.
Deleted the 2 original views and renamed the 2 new ones to be tht of the old.
Previewed, saved, quick publish.
Now when I open the form in the SP 2010 forms library, it opens fine but when I try to switch views nothing happens.
I returned to IP and did a full publich (not quick) all went fine but the same problem.
Back to IP and I made the second view the default just to see.
Re-publish, open the form and the second view shows as default (the one I could not previously switch to) but now when I try to switch to the other nothing happens!
Both views are set to allow to be shown in view menu. Is almost as though the drop down itself was not firing