Daily build 11 april

[Ubuntu]

After installation of the daily-build from 11 april, this message was on
my screen.
My older installation, upgrades and works fine, but has the same messages.
The system is running good, i don't know what the problem is.
The system has a few libs and programs from Gnome and KDE.

Regards;
Ron

Warning in file "/usr/share/applications/gnumeric.desktop": usage of
MIME type "zz-application/zz-winassoc-xls" is discouraged
("zz-application/zz-winassoc-xls" should be replaced with
"application/vnd.ms-excel")
Updating software catalog...this may take a moment.
INFO:softwarecenter.db.pkginfo_impl.aptcache:aptcache.open()
WARNING:softwarecenter.db.update:The file:
'/usr/share/app-install/desktop/sonic-visualiser:x-sonicvisualiser-layer.desktop'
could not be read correctly.
The application associated with this file will not be included in the
software catalog.
Please consider raising a bug report for this issue with the maintainer
of that application
WARNING:softwarecenter.db.update:The file:
'/usr/share/app-install/desktop/workrave:workrave.desktop' could not be
read correctly.
Please consider raising a bug report for this issue with the maintainer
of that application
Software catalog update was successful.