Hi NoOp
You didn't say he was what? It is helpful if you'd quote what you are
replying to. Snipping is good, but simply replying without some quote &
attribution isn't helpful - particularly if someone is sorting through
the archives.
I didn't snip anything. I simply replied through Nabble, which doesn't quote
or append the message I'm replying to. Since it works in Threads my answer
was linked to your post
http://nabble.documentfoundation.org/lower-part-of-dialog-boxes-not-visible-tt2951830.html#none
To answer as I am doing now, I have to use Gmail which for me is not so
practical 
We finally figured out that Thomas is using the 'Medium - 125%' setting
in Win7 (Control Panel|All Control Panel Items|Display). There is a
warning when setting that in Win7, it states:
<quote>
Some items may not fit on your screen if you choose this setting while
your display is set to this resolution
</quote>
Actually many (all?) Asus netbooks use this setting as default. So they will
not see that warning 
Did/can you replicate on a netbook? I can't on an HP Mini
w/Win7-Starter. If you can, then I agree & it would be a good idea for
you to file a bug report.
Since the extended dialog is well over 500 pixels high I know it won't fit
at least on any of the 7 inch netbooks which have a screen resolution of
800x480. On 10 inch netbooks it will depend on the DPI (as you mentioned)
but also on the Theme font size
Of course LO can't predict all these situations but in this particular case
there is a lot of vertical space wasted on the dialog which could be
optimized.