The scrolling bug is caused by this change:

http://source.squeak.org/trunk/Morphic-cmm.984.mcz

Morph>>handlesMouseMove: anEvent
"Do I want to receive mouseMove: when the hand passes over the receiver?
Rules say that by default a morph gets #mouseMove iff
* the hand is not dragging anything,
+ and some button is down,
+ and the receiver is the current mouse focus."
---> self eventHandler ifNotNil: [^ self eventHandler handlesMouseMove:
anEvent]. <-------
anEvent hand hasSubmorphs ifTrue: [ ^ false ].
(anEvent anyButtonPressed and: [ anEvent hand mouseFocus == self ])
ifFalse: [ ^ false ].
^ true

There seem to be some unintended behavior because of this change.

Karl

On Mon, Jun 1, 2015 at 10:11 PM, karl ramberg <karlramberg at gmail.com> wrote:

> In latest image the mouse seem to scroll sliders just by mouse over the
> scroll bar.
> It's a very unusual behavior, and I think I would like to opt out of it.
>
> Is there a preference or is this a bug ?
>
> Karl
>
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