OS: Windows 64bit
The titlebar disappears if i switch from the fullscreen-mode back to the browser-mode with the setting described below.
Settings:
Switching Mode: "Use double click to switch between" = "Browser <> Viewer"
Effect: titlebar is not shown anymore
To reproduce:
1. Start XnView with shown titlebar
2. It starts in browser-mode
3. Open an image: it switches to viewer-mode
4. Press F11 to switch to fullscreen-mode
5. Doubleclick to get back to browser-mode
Actual behaviour (bug): we are in browser-mode but the titlebar is missing

Expected behaviour: we should be in the browser-mode with shown titlebar (behavior of <0.85)