Get a project with source root A under SVN and source root B not under VCS.
Get an up-to-date package under A. Move package to root B.
Undo move. Project view and Changes window look Ok, but there is error message in the bottom of Changes view:
"Error updating changes: local\path\A\package\.svn containing working copy admin area is missing".
(BTW, why this error is shown in bottom area, not in Message panel?)
Package directory really does not contain .svn/* files. External removing package and svn up helps.