Tested with current gnupg and pinentry-qt4:

pinentry qt4 (git 5190773293bc38550bbc8aeb1b539bfb47a47c78)
qt 4.7 
gpg (GnuPG) 2.1.0-git328ac58
libgcrypt 1.5.0-gitb90be28

As I already explained: It works for me using the qt pinentry!

The release pinentry 0.8.0 version (from 2010-03-03) is based on svn222 (see
tags(pinentry-0.8.0).

Use the released 0.8.0 qt pinentry and not some earlier (i.e. -svnXXX versions).

Just to make sure:
I tested with gnupg 2.0.16 + pinentry 0.8.0-svn234.
You say that I should test gnupg 2.0.16 + pinentry 0.8.0-svn237.
Right?
(But in T1237 (wk on Sep 28 2010, 01:05 PM / Roundup) you wrote: "you need a newer gnupg".)

2.0.16 should be sufficient, though. Just use a recent pinentry-qt.

Right, you need a newer gnupg. Pinentry has no i18n support, thus your tests
are pointless.

Just to note:
I tested with the debian package pinentry-qt (0.8.0.svn234-0kk1) from
files.kolab.org. It's the same problem with pinentry-qt and pinentry-gtk (see
test below).
You wrote that pinentry-qt works corectly since 0.8.0 (=svn222). I can't confirm
this with my test below. Or do you mean, that the additional changes in gnupg
are required for show the german "Abbrechen" button text in pinentry-qt?

There are actually two problems here.

$ gpg-agent --version
gpg-agent (GnuPG) 2.0.16

Note that pinentry does not have any i18n features. The labels for all buttons
as weel as the prompts are provided by the caller. The Cancel you see are
merely fallbacks.

This is not a pinentry problem but one of gpg-agent. What version of gpg-agent
are you using?

Werner, please note: this issue is kkc.

Fixed again. (svn 5122).

It seems, the buggy translation had been reintroduced:

Closing this report, as nothing happened in half a year with regards to the
finnish translation.

Thanks, applied.

D67: 194_gnupg2_de_po_081206.diff

Found 3 typos after the update. Can you accept them without the disclaimer? Diff
attached.

Applied to 1.4 and 2.0, svn 4843.