Style sheet regressions in 2.3.x

[Geert Janssens]

Bad news. While trying to update the documentation on custom style sheets I 
found two regressions:

https://bugzilla.gnome.org/show_bug.cgi?id=635706
https://bugzilla.gnome.org/show_bug.cgi?id=635708

The first bug is that it seems no longer possible to add a logo and/or header 
image to a report.

The second thing I found is that there are 4 stylesheets (Easy, Fancy, Footer, 
Technicolor), but they seem to be exactly the same.

I have marked them for target 2.4 since they are regressions. Can someone that 
has worked in this area have a look at this ?

Geert