In the info box at the bottom of the app, even though scan0003.tif (raw
file) was being currently scanned in and displayed (as well as other
raw image files in the batch list), the info box kept stating
"scan0001.tif" was being scanned in!
Vuescan-83 & Gentoo Linux
Annoying as that may be but that's really cosmetic and the least of
your worries...
As you've discovered and documented in parallel messages (Auto Setting
Anomaly, Seg fault on vuescan, invalid pointer, etc...) VueScan has
much bigger problems! At best, it may only be suitable for low quality
quick-and-dirty highly compressed Web JPGs or tiny prints. VueScan is
bug-ridden and notoriously unreliable causing massive corruption in
image data even when it pretends to "work".
I realize you already know all that and on Linux your options are
fairly limited but it helps to put things into perspective and not
expect too much from VueScan. Quite the contrary!
Now, I gather from your other messages that you know your way around
the system so - even though it's a long shot - but have you considered
rolling your own? At the most fundamental level a scanner program is
really simple data acquisition and not very difficult to write. For
what it's worth I put together a scanner program in less than a week
(albeit different OS and different scanner). So, it's not as daunting
as one may think as long as you leave out all the image editing stuff
which, actually, doesn't belong in a scanner program anyway. Doubly so
for Linux/Unix systems which are inherent modular from the ground up
i.e. why repeat Gimp functionality in a scanner program.
Anyway, I haven't really done any scanner programming on Linux but
there's the SANE library which, I believe, should make things easier.
In the long run, and depending on how much scanning you have to do,
it's far less time consuming to write your own and be done with it
instead of permanently chasing the never ending VueScan bugs.
Don.