Hi Robert,

I am on Windows 7 SP1 so am probably in a good position to try to replicate.�� Trying to align with your screen snapshot this is what I've done:
1. Downloaded and launched fresh image build 30782 with PharoLauncher.
2. Clicked World > System Browser
3. Clicked on Announcements-View, AnnouncementSpy, [class-side] checkbox, instance creation, openOn:, [class-side] checkbox
and all is fine.��
Can you detail where your test procedure differs from that?
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Do you have any startup scripts under C:\Users\$yourAccount\AppData\Roaming\pharo
or have you saved any preferences. (btw, if there a command line option to avoid processing startup and preference files, it would be useful in this situation to remove doubt?)

I can't think where a difference may lie except the operating system version.�� Can you know someone with Windows 7 or 8 your can test Pharo from a USB stick.
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If I put (self haltOnce) at the top of EdgeGripMorph>>mouseMove: a large amount of clicking around the <Class-side> cannot trigger the breakpoint.�� This only triggers if I drag edge of the Browser window to change its size.�� So is there some interaction that occurs with that in your testing?
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Now it seems the problem is that _lastMouse_ instance is nil. Investigating shows this has only three relevant references (from the debugger, right-click on the variable in the bottom left pane and choose <List Methods Using "lastMouse". These are:
* AbstractResizerMorph>>mouseDown:
* EdgeGripMorph>>mouseMove:
* EdgeGripMorph>>mouseDown: - which overrides AbstractResizerMorph, so for our purposes there are only two relevant references to _lastMouse_
#mouseDown is the only method that stores into _lastMouse_ which is guaranteed to be non-nil since the collection is hardcoded.��
So it appears that #mouseDown should be called before #mouseMove and it is not.

Try putting the following code at the top of #mouseDown and #mouseMove
������ Transcript crShow: thisContext printString , ' <-- ' , thisContext sender printString , '�� (',�� lastMouse printString , ')'.

Then doing the following:
1. Clicked World > System Browser
2. Grabbed bottom edge and dragged up to make window smaller.
I get...
�� �� WindowEdgeGripMorph(EdgeGripMorph)>>mouseDown: <-- WindowEdgeGripMorph>>mouseDown:�� (nil)
������ WindowEdgeGripMorph(EdgeGripMorph)>>mouseMove: <-- WindowEdgeGripMorph>>mouseMove:�� ({(641@664). (432.0@3.0). (30@ -2.0)})
������ WindowEdgeGripMorph(EdgeGripMorph)>>mouseMove: <-- WindowEdgeGripMorph>>mouseMove:�� ({(641@663). (432.0@3.0). (30@ -2.0)})
������ WindowEdgeGripMorph(EdgeGripMorph)>>mouseMove: <-- WindowEdgeGripMorph>>mouseMove:�� ({(641@656). (432.0@3.0). (30@ -2.0)})

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btw, my VM is same as yours...
NBCoInterpreter NativeBoost-CogPlugin-GuillermoPolito.19 uuid: acc98e51-2fba-4841-a965-2975997bba66 Dec�� 7 2013
NBCogit NativeBoost-CogPlugin-GuillermoPolito.19 uuid: acc98e51-2fba-4841-a965-2975997bba66 Dec�� 7 2013
https://github.com/pharo-project/pharo-vm.git Commit: 71adca113a9aff2876288927e5c1c86bf7ac13e2
Date: 2013-12-07 05:00:47 -0800 By: Philippe Back <philippeback@gmail.com> Jenkins build #14776

cheers -ben
P.S. I've not encountered a problem like that with Nautilus in the past 3 months I've been using it - but different environments can dig out corner cases. Good luck.

Robert Shiplett wrote:
hit another walkback first

screenshot attached

this must be Windows XP 3.1 issue ...


On 26 February 2014 04:36, Sven Van Caekenberghe <sven@stfx.eu> wrote:

On 26 Feb 2014, at 01:57, Robert Shiplett <grshiplett@gmail.com> wrote:

> I am running from that latest.zip tonight and PackageTreeNautilusUI >>update is getting a walkback messageNoUnderstood for
> receiver of >>protocolsFor: is nil
>
> I simply flipped to class view in Announcements and then flipped that toggle back.
>
> Does this need to be reported, or is Nautilus still known to be unstable ?

I can't reproduce this either, please be more specific.

BTW, Nautilus is stable and used daily by the whole community. Of course, it is a complex piece of code with lots of UI and system interactions, so issues are always possible.

Sven