pytz and timezone specialists

[manatlan]

Here is a really simple code :
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from datetime import datetime
from pytz import timezone

tz=timezone("Europe/Paris")

d=datetime(2008,12,12,19,00,00,tzinfo=tz)
print d.isoformat()

d=datetime.now(tz)
print d.isoformat()
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when I run it, it displays (according current time ;-):

2008-12-12T19:00:00+00:09
2008-12-05T19:15:38.135467+01:00

The Europe/Paris timezone is GMT+1 ... the second date seems to be
right (+01:00 at the end)

But why the first date ends with "+00:09" ?!? it should be +01:00 ...
no ?!
Where's the bug ?!? (sure : it's me ;-) ... but i don't understand
this simple thing)