Visit tinyurl.com, enter an URL in the text box ("Enter a long URL to make tiny:") and finally click on "MakeTinyURL!". When you click on "MakeTinyURL!" (tinyurl.com) and the page with the new tiny url is loaded, CPU usage goes up to 100%. Closing the tab, or going back, will make the CPU usage normal again. Reproducible here with rekonq and Arora with Qt 4.6.2 Original bug report: https://bugs.kde.org/show_bug.cgi?id=240227
Reproduced with 4.7/trunk.
Seems to be flash-related. I don't get 100% cpu on qttestbrowser but I do get a lot of this output: (<unknown>:10936): Gdk-CRITICAL **: gdk_colormap_new: assertion `GDK_IS_VISUAL (visual)' failed (<unknown>:10936): Gdk-CRITICAL **: gdk_colormap_alloc_colors: assertion `GDK_IS_COLORMAP (colormap)' failed (<unknown>:10936): Gtk-CRITICAL **: gtk_widget_modify_bg: assertion `GTK_IS_WIDGET (widget)' failed (<unknown>:10936): Gdk-CRITICAL **: gdk_colormap_free_colors: assertion `GDK_IS_COLORMAP (colormap)' failed (<unknown>:10936): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed (<unknown>:10936): Gtk-CRITICAL **: gtk_widget_get_visual: assertion `GTK_IS_WIDGET (widget)' failed (<unknown>:10936): Gdk-CRITICAL **: gdk_colormap_new: assertion `GDK_IS_VISUAL (visual)' failed (<unknown>:10936): Gdk-CRITICAL **: gdk_colormap_alloc_colors: assertion `GDK_IS_COLORMAP (colormap)' failed (<unknown>:10936): Gtk-CRITICAL **: gtk_widget_modify_bg: assertion `GTK_IS_WIDGET (widget)' failed (<unknown>:10936): Gdk-CRITICAL **: gdk_colormap_free_colors: assertion `GDK_IS_COLORMAP (colormap)' failed (<unknown>:10936): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed (<unknown>:10936): Gtk-CRITICAL **: gtk_widget_get_visual: assertion `GTK_IS_WIDGET (widget)' failed (<unknown>:10936): Gdk-CRITICAL **: gdk_colormap_new: assertion `GDK_IS_VISUAL (visual)' failed (<unknown>:10936): Gdk-CRITICAL **: gdk_colormap_alloc_colors: assertion `GDK_IS_COLORMAP (colormap)' failed (<unknown>:10936): Gtk-CRITICAL **: gtk_widget_modify_bg: assertion `GTK_IS_WIDGET (widget)' failed (<unknown>:10936): Gdk-CRITICAL **: gdk_colormap_free_colors: assertion `GDK_IS_COLORMAP (colormap)' failed (<unknown>:10936): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
I can't reproduce anymore with 4.7/Trunk and flash plugin 10.3.