Flickering problem depending on the number of items in a repeated control

When moving from a form to another one (using the navigation bar in the "Support" panel) we have flickering problems.

If you watch the screencast (global_refresh.avi)carefully, you'll notice that when the outgoing form (page 4/72 at the "Support" panel level) contains more repeated items in the repeated group of controls "Locuteurs, type, message-clé, tonalité" than the upcoming form (page 5/72 at the "Support" panel level) then we have like a global refresh of the screen during the navigation. On the other hand when moving from a form (5/72) that contains less or the same number of repeated items then the upcoming form (6/72) the global refresh won't occurs.

In the screenast (No_global_refresh.avi) we have executed the same actions but as you can see the "Thèmes" panel has been collapsed so that the repeated controls are hidden. In this configuration the global refresh is never occurring in either case.

Please rename the file to ".rar" as the upload is limited to some extensions! The attached screencast was shot with a 1.5.4.1035 version but we have exactly the same behaviour with 1.5.6.1004.

I would appreciate any idea/explanation you can give in order to improve the users experience on that point.

Regards,

Guillaume