Hi,
I use pd (ext) since several years, and first of all, congratulation and thanks for this great project!
Here are some bugs and problems I experienced. I run PD on Ubuntu Oneiric, and also tried it on another computer on Maverick...
These bugs are present in the download from april 11th.
(Tcl) ERREUR NON GÉRÉE : expected integer but got "Sans"
    (processing "-font" option)
    invoked from within
".x9ae7ae0.c itemconfigure 9ae1a48LABEL -font {DejaVu Sans Mono 8 bold} -fill #000000 -text {} "
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 $cmds_from_pd"(Tcl) ERREUR NON GÉRÉE : expected integer but got "Sans"
    (processing "-font" option)
    invoked from within
".x9ae7ae0.c itemconfigure 9ae1a48LABEL -font {DejaVu Sans Mono 8 bold} -fill #000000 -text {} "
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 $cmds_from_pd"

hope this will be helpful...
r