I hope you do not hate me for reporting so many bugs... :)
During the koha installation I chose to install the sample of Library/Branches.
Now I want to delete them, using the webpage
http://localhost:8080/cgi-bin/koha/admin/branches.pl, of course... I
have successfully deleted all of them except of libraries of Franklin,
Midway, Pleasant Valley and Springfield. When I select to delete these
libraries, koha shows me the message "Library deleted" in the same
webpage, but the library persists.