Odd message

[lawton27]

This might be to do with infrastructure sharing as that's the patch I'm running, but it might not, I received this message show in the screenshot whilst on OTTD, its definitely linked with ottd as 'openttdWIN' is the name of my shortcut and when I closed it ottd closed too, noting bad happened, but what does it mean?

[FHS]

That is the OpenTTD Debug console which should not be viewable for Windows users (Although it shows up here too).
The "Nested Widgets give different results" doesnt mean anything.

[Roujin]

Yes, it does mean something, but it is nothing fatal, nor of any concern to the normal user.

[Alberth]

Also, they are in the process of getting eliminated.