argument "--now" behaves strangely

[human]

Hi,

It's probably someting I just don't understand, but I've read both du2rrd code and all the available documentation without finding an explanation.

I'm trying to use --now=time to make tests with du2rrd without having to wait for the next day for an update.

First test:

• deletion of all rrd files and folder.
  
• injection of data with --now= value in seconds from Epoch set to the date "now - 1 day".
  
• injection of data without --now option.
  
• dump of an rrd file: 3 rows instead of 2. First row at "2 days old", second row at "yesterday", third row at "today".
  

Second test:

• deletion of all rrd files and folder.
  
• injection of data with --now=$(date +%s)
  
• dump of an rrd file: 2 rows instead of 1. First row at "yesterday", second row at "today".
  

example, with date +%s around 1245221194 it gives:

	<!-- 2009-06-16 02:00:00 CEST / 1245110400 --> <row><v> 7.7363195904e+10 </v></row>
	<!-- 2009-06-17 02:00:00 CEST / 1245196800 --> <row><v> 7.7363195904e+10 </v></row>

I believe using time in seconds since Epoch should prevent any TZ issue, but may be I'm missing something, and I'm quite PERL illiterate…