Can you be a tad more specific?
How does a drawing packing generate eBook formats?
Which Kindle? Mine is B&W so I cannot add in colouring.
Acorn
Printable View
Could be I suppose. I don’t fully know my way around the program. I checked the page property options for US Letter and that seemed be ok (see attached partial screen shot below). If you can reproduce the bug, Inkscape have info on how to write a bug report on their website, which is linked under the Help menu (screenshot below).
Attachment 126977 Attachment 126978
it only seems to be if you use new from template and choose letter. I created a new default with the correct size (letter portrait) and it starts fine.
new from template does not have a letter option on my installation of inkscape 1.0 [windows 64bit .EXE installer version].....
Try New > Blank Page and then choose Letter from the dropdown under Page Size ...
AND mine comes in as a 9½" x 11" page too. Although it is defined as 8½" x 11"
Attachment 126980
and they make if far to difficult to post a simple bug, that I didn't bother, and I suspect others may not either, hoping that someone who already has an account will post it for them.
nope don't see that...
Attachment 126981
my build is
1.0 (4035a4fb49, 2020-05-01)
its possible the glitch is between inkscape and the regional settings of your computers...
Possibly, mine has the same build number.
only other thing I can think of is the package - I used the .EXE windows 64bit from here: https://inkscape.org/release/1.0/platforms/