... at least, it looks like this is the problem.
once upon a time i did 'apt-src install sysvinit'; it installed 2.85-4.
while 2.85-7 is now the current debian release, apt-src strictly refuses
to upgrade, claiming the newest version is already installed.
on a change of the upstream version it starts the upgrade.

The minor correction below seems to correct this error. Please verify, and if possible update.

*** /usr/share/perl5/AptSrc.pm~	2008-05-31 19:48:32.000000000 +0200
--- /usr/share/perl5/AptSrc.pm	2008-06-22 14:14:17.000000000 +0200
***************
*** 374,380 ****
  	}

  	my ($version, $source)=$this->findsource($this->source);
! 	if (! defined $version || $vs->compare($version, $this->version) != 1) {
  		# Nothing to upgrade.
  		return;
  	}
--- 374,380 ----
  	}

  	my ($version, $source)=$this->findsource($this->source);
! 	if (! defined $version || $vs->compare($version, $this->version) <= 0) {
  		# Nothing to upgrade.
  		return;
  	}

Sven's patch (message #10) works.

I debugged the problem and can explain Sven's patch:

In my situation (i.e., when comparing 2.2.2-1unbuntu1 and 2.2.4-1ubuntu1.1
$vs->compare($match->{Version}, $version)  returns 2.

This is in accordance with the documentation of AptPkg::Version (which
is the type of $vs):

       compare(A, B)
           Compare package version A with B, returning a negative value if A
           is an earlier version than B, zero if the same or a positive value
           if A is later.

(from the AptPkg::Version man page)

Apt-src 0.25.1-0.1 only checks whether compare only returns a value != 1.
If not, apt-src thinks the package has not changed.
However, any return value >0 should have the same effect as 1.
This is what the patch does.

Best,
Dominique.

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