Wheel-mouse Zoom/Unzoom is broken.
Mantis Issue 913, reported by salbert, assigned to salbert, created: 2014-03-21
Wheel-mouse (un)zooming in image-view is broken. Tested since http://hg.orfeo-toolbox.org/Monteverdi2/rev/6c513a5bca56
1395671339 - julienCTRL + zoom still works. I removed the zoom without control which may be what you reported (zooming without CTRL is not fast zoom and lag is terrible).
1395938601 - salbertWheel-mouse zooming was present in previous versions. This could seem a bug to users when new version of Monteverdi2 is out.
Users might not know they must use CTRL-click to zoom.
1429262756 - julienClosing resolved bugs.