IMO that is not the expected outcome for the steps you gave.
Click acct-group.
This one file should be selected, agreed.
Shift-click app-admin.
All file between, including acct-group and app-admin should be selected now.
Ctrl-Shift-click app-cdr.
Afaik CTRL+SHift extends the most recent selection, while keeping previously selected files.
So now all files from acct-group till app-cdr should be selected, different from what you expect.
What you most likely want to do:
Click acct-group.
Shift-click app-admin.
Ctrl-click app-backup.
Ctrl-Shift-click app-cdr.
That would result to the outcome of the pic you attached, however that seems to work fine here .. so no idea what the issue is about.
it should work with single-left-click in both Icons and Tree views.
Does the bug show for single click mode or for both modes? For the main view, options are icon view, list view and compact view, where you can enable "expandable folders" for list view. Do you refer to this one? Or do you refer to the tree-view side-pane / bookmarks side-pane? I don't feel like testing all possible combinations, just because you missed being precise.
That would result to the outcome of the pic you attached, however that seems to work fine here .. so no idea what the issue is about.
I will explain in a separate comment.
it should work with single-left-click in both Icons and Tree views.
Does the bug show for single click mode or for both modes? For the main view, options are icon view, list view and compact view, where you can enable "expandable folders" for list view. Do you refer to this one? Or do you refer to the tree-view side-pane / bookmarks side-pane? I don't feel like testing all possible combinations, just because you missed being precise.
For the main view with icon view,
For the main view with list view, expandable folders was off.
Now I see it could be my fault about the tree view.
Really don't know why I could name a list as a tree...
I really sorry about that.
So, the starter comment could be about the side-pane / bookmarks side-pane at all, ugh...
And it's not implemented (and wasn't meant to be) for the main view...
UPD: the side-pane / bookmarks side-pane doesn't understand Ctrl/Shift at all.
@kuraga maybe you did some modifications to mouse-input or xmodmap in some way or the other. Can you reproduce the problem on your site as well when using a fresh user account?
Sorry, I am a bit lost here ... so the expected result for Control+Shift+click on the last pic would be to add everything between the old selection and the "dwn" ? (namely "tmp","vid" and "dwn")