[syslog-ng]$DAY not working in filenames macros in 1.6.x as it did in 1.5.x

[Andrew Fort]

Hi guys, I am running syslog-ng 1.5.15 on some debian stable machines.

All good, all happy.

I have a source:

source network-hosts {
	udp(ip(0.0.0.0) port(8514));
	tcp(ip(0.0.0.0) port(8514) max-connections(200));
};

I use filename macro expansion to auto-rotate my logs.  My destinations 
look exactly like:

destination logfiles-host { 
file("/var/log/HOSTS/$HOST/$YEAR/$MONTH/$YEAR$MONTH$DAY\_$HOST\_$PROGRAM"
         template("$ISODATE [$HOST] <$FACILITY> $MSG\n")
         template_escape(no)
         owner(root)
         group(logs)
         perm(0660)
         dir_perm(0770)
         create_dirs(yes));
};

the routing stanza goes:

log {
         source(network-hosts);
         destination(logfiles-host);
};

This works as I expect (even without escaping the _'s between $DAY, 
$HOST and $PROGRAM).

My log paths look like:

/var/log/HOSTS/mel1/2005/02/20050203_mel1_named
/var/log/HOSTS/mel1/2005/02/20050203_mel1_sendmail

Great.

However, using 1.6.x (I've not tested 1.6.6, to be sure, only 1.6.4 and 
1.6.5) on both Solaris and Linux, using the exact same config (i.e., 
when I upgraded, for example), using this destination:

destination d_local {
         file("/var/log/LOCAL/$HOST/$YEAR/$MONTH/$YEAR$MONTH$DAY\_$HOST"
         template("$ISODATE [$HOST] <$FACILITY> $MSG\n")
         template_escape(no)
         perm(0660)
         dir_perm(0770)
         create_dirs(yes));
};

I get this:

/var/log/LOCAL/mel1/2005/02/200502mel1

So $DAY is not expanding.  Same thing occurs when I use

         file("/var/log/LOCAL/$HOST/$YEAR/$MONTH/$YEAR$MONTH$DAY_$HOST"

Is this a problem with $DAY, the _, or something else?

Let me know if I can provide further info to help debug this..
Anyone else run into this?  I'd like to upgrade all my boxes to 
1.6.{4,5,6} eventually but at the moment this is holding me back from 
moving to 1.6.

Cheers,
Andrew Fort