Public bug reported:

Hi there,

first of all many thanks for packaging this nifty application. From what
I've read it's pretty hard to compile on Linux systems so I was very
glad to find it in the official repositories.

There seem to some issues with the GTK UI, though. As you can see in the
screenshot some UI elements such as the sliders and checkmarks don't
render correctly. Looking at the CLI output I get the following errors
which seem to be connected to the graphical issues:

    (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to allocate widget with width -5 and height 16

    (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to allocate widget with width -5 and height 16

    (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to allocate widget with width -5 and height 16

    (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to allocate widget with width -5 and height 16

This seems to affect the sliders on the "geometry" tab only and makes it
pretty hard to customize these settings. It would be great if you could
take a look at what's going on.

Thank you for taking the time to read this!

##Additional information##

apt-cache policy qutemol
qutemol:
  Installed: 0.4.1~cvs20081111-2
  Candidate: 0.4.1~cvs20081111-2

lsb_release -rd
Description:    Ubuntu 12.04.2 LTS
Release:        12.04

uname -r
3.5.0-28-generic

 - Bug appears on all tested DE's (Unity, Openbox, XFCE)
 - Bug does not depend on GTK theme in use (tested: Ambiance, Radiance, 
Clearlooks, ZonColor)

** Affects: qutemol (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "Screenshot_2013-05-09_141052.png"
   
https://bugs.launchpad.net/bugs/1178239/+attachment/3670993/+files/Screenshot_2013-05-09_141052.png

** Description changed:

  Hi there,
  
  first of all many thanks for packaging this nifty application. From what
  I've read it's pretty hard to compile on Linux systems so I was very
  glad to find it in the official repositories.
  
  There seem to some issues with the GTK UI, though. As you can see in the
  screenshot some UI elements such as the sliders and checkmarks don't
  render correctly. Looking at the CLI output I get the following errors
  which seem to be connected to the graphical issues:
  
-     (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
+     (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
  to allocate widget with width -5 and height 16
  
-     (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
+     (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
  to allocate widget with width -5 and height 16
  
-     (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
+     (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
  to allocate widget with width -5 and height 16
  
-     (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
+     (qutemol:31588): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
  to allocate widget with width -5 and height 16
  
  This seems to affect the sliders on the "geometry" tab only and makes it
  pretty hard to customize these settings. It would be great if you could
  take a look at what's going on.
  
+ Thank you for taking the time to read this!
  
- Thank you for taking the time to read this!
+ ##Additional information##
+ 
+ apt-cache policy qutemol
+ qutemol:
+   Installed: 0.4.1~cvs20081111-2
+   Candidate: 0.4.1~cvs20081111-2
+ 
+ lsb_release -rd
+ Description:  Ubuntu 12.04.2 LTS
+ Release:      12.04
+ 
+ uname -r
+ 3.5.0-28-generic
+ 
+  - Bug appears on all tested DE's (Unity, Openbox, XFCE)
+  - Bug does not depend on GTK theme in use (tested: Ambiance, Radiance, 
Clearlooks, ZonColor)

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https://bugs.launchpad.net/bugs/1178239

Title:
  gtk_widget_size_allocate() error makes it impossible to move sliders

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