GNOME Bugzilla – Bug 171297
When pasting a window you are asked by a placeholder, though it is not neccessary.
Last modified: 2005-03-29 16:49:18 UTC
Create a window, select it in the treeview, cut it and press the paste button in the toolbar.... it asks for a placeholder :). This may seem playing dirty tricks, but in fact can happen when copying windows among projects (copying to a new project).
See Bug 167376. There is a patch for it as well. :)
*** This bug has been marked as a duplicate of 167376 ***