The following commit shows what happens:

http://svn.gna.org/viewcvs/pokersource?view=rev&rev=5973

I did a make distcheck just before committing, and I ended up inadvertently regenerating all the .po files. Discussion about this with dachary from IRC:

<bkuhn> dachary: how come make-dist-check changes all the po files?
<dachary> I think this is because the .pot is not commited, this should be
fixed. [15:35]
<bkuhn> it changes the "POT-Creation-Date: 2009-04-12 10:02+0200\n" in each
one [15:36]
<bkuhn> dachary: Ok, I have verified that the last commit merely changed
POT-Creation_Date in each case. I will not revert the change, unless
you want me to? [15:38]
<dachary> I think the problem lies in the fact that some make clean (distclean
? clobber) removes the .pot that is re-generated. It should not be
removed. [15:39]
<<bkuhn> Ok, I am not going to investigate this now, but I will the commit as
is