On my copy of darcs 2.0 repository:

    $ darcs query repo
              Type: darcs
            Format: hashed, darcs-2
              Root: /home/lele/wip/darcs-2.0
          Pristine: HashedPristine
             Cache: thisrepo:/home/lele/wip/darcs-2.0, repo:http://darcs.net
      predist Pref: autoconf && ./configure --disable-optimize && ${MAKE-make} predist
         test Pref: autoconf && ./configure --with-type-witnesses && make -j4 witnesses && make clean && ./configure && make -j 4 all unit && make -j2 test_unit check test_network
    Default Remote: http://darcs.net
       Num Patches: 5626

the "changes -i" does not seem to work properly: it loops over the
second patch, and never reaches the third:

    $ darcs changes -i
    Thu May  1 13:32:07 CEST 2008  David Roundy <droundy@darcs.net>
      * reorder test suite around fact that test_unit takes so long.

    Shall I view this patch? (1/5626) [yNvpxqkj], or ? for help: y
    [reorder test suite around fact that test_unit takes so long.
    David Roundy <droundy@darcs.net>**20080501113207] changepref test
    autoconf && ./configure --with-type-witnesses && make -j4 witnesses && make clean && ./configure && make -j 4 all unit && make -j8 check test_network test_unit
    autoconf && ./configure --with-type-witnesses && make -j4 witnesses && make clean && ./configure && make -j 4 all unit && make -j2 test_unit check test_network
    Shall I view this patch? (1/5626) [yNvpxqkj], or ? for help: y
    [reorder test suite around fact that test_unit takes so long.
    David Roundy <droundy@darcs.net>**20080501113207] changepref test
    autoconf && ./configure --with-type-witnesses && make -j4 witnesses && make clean && ./configure && make -j 4 all unit && make -j8 check test_network test_unit
    autoconf && ./configure --with-type-witnesses && make -j4 witnesses && make clean && ./configure && make -j 4 all unit && make -j2 test_unit check test_network
    Shall I view this patch? (1/5626) [yNvpxqkj], or ? for help: y
    [reorder test suite around fact that test_unit takes so long.
    David Roundy <droundy@darcs.net>**20080501113207] changepref test
    autoconf && ./configure --with-type-witnesses && make -j4 witnesses && make clean && ./configure && make -j 4 all unit && make -j8 check test_network test_unit
    autoconf && ./configure --with-type-witnesses && make -j4 witnesses && make clean && ./configure && make -j 4 all unit && make -j2 test_unit check test_network
    Shall I view this patch? (1/5626) [yNvpxqkj], or ? for help: y
    [reorder test suite around fact that test_unit takes so long.
    David Roundy <droundy@darcs.net>**20080501113207] changepref test
    autoconf && ./configure --with-type-witnesses && make -j4 witnesses && make clean && ./configure && make -j 4 all unit && make -j8 check test_network test_unit
    autoconf && ./configure --with-type-witnesses && make -j4 witnesses && make clean && ./configure && make -j 4 all unit && make -j2 test_unit check test_network
    Shall I view this patch? (1/5626) [yNvpxqkj], or ? for help: q

Maybe something to do with the second patch being a setpref? And, by
the way, why does it immediately show the "content" of that patch,
without being asked for (with 'v')?

thank you,
ciao, lele.
-- 
nickname: Lele Gaifax    | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas    | comincerò ad aver paura di chi mi copia.
lele@nautilus.homeip.net |                 -- Fortunato Depero, 1929.

Hi Lele,

I think this is not a bug, but an unexpected change in behaviour.  Sorry!
Here is the patch that made the change

Mon Apr 21 11:52:47 BST 2008  Eric Kow <E.Y.Kow@brighton.ac.uk>
  * resolve issue795: Make 'darcs changes -i' behave more like other jobs.
  
  Old behaviour:
   Shall I continue to view changes?
     y - do not view this patch; keep going [DEFAULT]
     n - quit
     v - view this patch; keep going
     q - quit
  
  New behaviour:
    Shall I view this patch?
     y - view this patch; keep going
     n - do not view this patch; keep going [DEFAULT]
     v - view this patch; keep going
     q - quit

Oh wait, you're right.  It does not 'keep going' as promised.  Will submit a patch

On Fri, 02 May 2008 08:55:39 -0000
Eric Kow <bugs@darcs.net> wrote:

> I think this is not a bug, but an unexpected change in behaviour.
> Sorry! Here is the patch that made the change
> 
> Mon Apr 21 11:52:47 BST 2008  Eric Kow <E.Y.Kow@brighton.ac.uk>
>   * resolve issue795: Make 'darcs changes -i' behave more like other
> jobs. 
>   Old behaviour:
>    Shall I continue to view changes?
>      y - do not view this patch; keep going [DEFAULT]
>      n - quit
>      v - view this patch; keep going
>      q - quit
>   
>   New behaviour:
>     Shall I view this patch?
>      y - view this patch; keep going
>      n - do not view this patch; keep going [DEFAULT]
>      v - view this patch; keep going
>      q - quit

Ok, so both 'y' and 'v' show the current patch. But I still see a
minor problem, because the help says:

    Shall I view this patch? (4/655) [yNvpxqkj], or ? for help: h
    How to use view changes:
    y: skip to the next patch
    n: quit view changes

but 'y' does the same as 'v' but does *not* present the next patch,
and 'n' does *not* quit but instead does effectively show the next
patch:

    $ darcs --version
    2.0.0 (2.0.0 (+ 73 patches))

    $ darcs changes -i
    Fri May  2 10:41:18 CEST 2008  lele@nautilus.homeip.net
      * Correct how darcs treats identical changes under darcs-2 format

    Shall I view this patch? (1/5628) [yNvpxqkj], or ? for help: y
    [Correct how darcs treats identical changes under darcs-2 format
    lele@nautilus.homeip.net**20080502084118] hunk ./src/best_practices.tex 317
    -darcs does considers two patches making the \emph{same} change to be a
    +darcs does \emph{not} consider two patches making the \emph{same} change to be a
    Shall I view this patch? (1/5628) [yNvpxqkj], or ? for help: y
    [Correct how darcs treats identical changes under darcs-2 format
    lele@nautilus.homeip.net**20080502084118] hunk ./src/best_practices.tex 317
    -darcs does considers two patches making the \emph{same} change to be a
    +darcs does \emph{not} consider two patches making the \emph{same} change to be a
    Shall I view this patch? (1/5628) [yNvpxqkj], or ? for help: v
    [Correct how darcs treats identical changes under darcs-2 format
    lele@nautilus.homeip.net**20080502084118] hunk ./src/best_practices.tex 317
    -darcs does considers two patches making the \emph{same} change to be a
    +darcs does \emph{not} consider two patches making the \emph{same} change to be a
    Shall I view this patch? (1/5628) [yNvpxqkj], or ? for help: n
    Fri May  2 01:36:29 CEST 2008  lele@nautilus.homeip.net
      * Added test for issue 803

    Shall I view this patch? (2/5628) [yNvpxqkj], or ? for help: n
    Thu May  1 13:32:07 CEST 2008  David Roundy <droundy@darcs.net>
      * reorder test suite around fact that test_unit takes so long.

    Shall I view this patch? (3/5628) [yNvpxqkj], or ? for help: q

You see, I hit 'y' twice and 'v' once, and get the same output, while
hitting 'n' I get the next patch.

The help message definitely needs some tweak, wrt 'y' and 'n'. Having
two choices that do the same thing is a little confusing (I mean, 'y'
and 'v'), but that's minor, once the help says the truth :-)

Thank you,
bye, lele.
-- 
nickname: Lele Gaifax    | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas    | comincerò ad aver paura di chi mi copia.
lele@nautilus.homeip.net |                 -- Fortunato Depero, 1929.

The following patch updated the status of issue827 to be resolved in the unstable branch:

* resolve issue827: correct changes -i behaviour 

Promised old behaviour:
    Shall I view this patch?
     y - view this patch; keep going
     n - do not view this patch; keep going [DEFAULT]
     v - view this patch; keep going
     q - quit

Actual old behaviour:
    Shall I view this patch?
     y - view this patch; stay put 
     n - do not view this patch; keep going [DEFAULT]
     v - view this patch; stay put 
     q - quit

New behaviour:
    Shall I view this patch?
     y - view this patch; keep going 
     n - do not view this patch; keep going [DEFAULT]
     v - view this patch; stay put 
     q - quit

You can view the patch details online here: 
http://darcs.net/cgi-bin/darcs.cgi/unstable/?c=annotate&p=20080502090907-2067a-f7d2aa0f226edb616939ccf1698e93228b7645f4.gz