failed lines in cmd when run firefox

[paridoth]

im running a clean install of firefrox from apt-get and when i run it i get these lines repeated about 20 times in the konsole

(firefox-bin:6489): Gdk-CRITICAL **: gdk_pixbuf_get_from_drawable: assertion `gdk_window_is_viewable (src)' failed

(firefox-bin:6489): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_n_channels: assertion `pixbuf != NULL' failed

(firefox-bin:6489): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_bits_per_sample: assertion `pixbuf != NULL' failed

(firefox-bin:6489): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_width: assertion `pixbuf != NULL' failed

(firefox-bin:6489): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_height: assertion `pixbuf != NULL' failed

(firefox-bin:6489): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_rowstride: assertion `pixbuf != NULL' failed

(firefox-bin:6489): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed


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what does this mean? should i be concerned?

[paridoth]

update


now when i go to run firefox it pops up for a split second then disapears and i get the following degugging info in the konsole

paridoth@kubuntu-zureal:~$ firefox
installing flashblock
Problem checking for failed upgrade: [Exception... "Component returned failure c
ode: 0x80004005 (NS_ERROR_FAILURE) [nsIRDFContainer.Init]" nsresult: "0x8000400
5 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://foxytunes/content/foxytun
esOverlay.js :: foxytunesFoxyTunesToBeInstalled :: line 1343" data: no]
/bin/sh: /usr/bin/esd: No such file or directory

what can i do to remedy this?