Hello,

I forward this bug from Debian[1]:

[quote]
This started happening to me since GTK+ was upgraded to 3.20 (although
there was a pile of many other updates at the same time, so the
problem might still be somewhere else).

Essentially: when I open shotwell and I click on any day with photos,
the thumbnails appear on the right panel as usual but

 a) the window background is white
 b) there's no scroll bar

So if the photos don't fit on the window I cannot scroll down.

However if I resize the window then the background turns black, the
scrollbar appears and everything seems normal again.

The app also prints the following warnings:

(shotwell:11310): Gtk-WARNING **: Theme parsing error: <data>:2:38: The style property GtkPaned:handle-size is deprecated and shouldn't be used anymore. It will be removed in a future version
(shotwell:11310): Gtk-WARNING **: Allocating size to SearchFilterToolbarToggleActionToolButton 0x56176a5a6330 without calling gtk_widget_get_preferred_width/height(). How does the code know the size to allocate?
(shotwell:11310): Gtk-WARNING **: Allocating size to SearchFilterToolbarToggleActionToolButton 0x56176a5a64d0 without calling gtk_widget_get_preferred_width/height(). How does the code know the size to allocate?

This last message is repeated a few more times.

Berto
[/quote]


CU
Jörg

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823835