QtCreator crashes when launching an application (Ctrl-R)

When launching an application with Ctrl-R the qtcreator crashes with the following message:

(<unknown>:4837): GdkPixbuf-WARNING **: Bug! loader 'png' didn't set an error on failure

(<unknown>:4837): Gtk-WARNING **: Error loading theme icon 'window-close' for stock: Internal error: Image loader module 'png' failed to complete an operation, but didn't give a reason for the failure

(<unknown>:4837): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

• • (<unknown>:4837): CRITICAL **: clearlooks_style_draw_render_icon: assertion `base_pixbuf != NULL' failed

(<unknown>:4837): Gtk-CRITICAL **: IA__gtk_style_render_icon: assertion `pixbuf != NULL' failed

(<unknown>:4837): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_pixels: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(<unknown>:4837): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed

(<unknown>:4837): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed
call callback
Segmentation fault (core dumped)

See enclosed backtrace generated with 'bt' command in gdb with generated core file.

Running the same application from QtCreator 2.1.0 (Based on Qt 4.7.1 (64 bit), Built on Mar 30 2011 at 16:17:05, from revision e80bb4437c) does not generate any crash or error.