O.K., Professor TwoLegsGood, I have completed the assignment.
"According to modern sources, Garson Kanin stepped in to direct portions of the film after Leo McCarey was involved in a near-fatal car accident."
http://www.tcm.com/tcmdb/title.jsp?stid=1148&category=Notes
Made me laugh. Yes, Mr McCarey was known for drinkin’ a bit too much and stepping out on the missus a bit too much. Caught up with him one night in pre production on My Fave Wife. Shade of The Awful Truth in McCarey’s homelife...