broken title with 1.5rc2

Hi,
in 1.5rc2 (and git HEAD) flavours/html.flav/foot contains:
<title>$(blog_title_with_path) $(pi_da) $(pi_mo) $(pi_yr)</title>

None of these variables expands to something (at least not for my
freshly generated blog), resulting in a title containing only some
spaces.

In the 1.4.3->1.5 changelog I found that:
$(blog_title_with_path)
must be changed to:
$blog_title : $pi_bl

I didn't really figure out what I had to do with the pi_* vars.

Dieter

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