date hooks not applied

just installed ff4 and torbutton 1.3.

when loading/reloading a url i get several identical warnings with this text:

Torbutton Exception in sandbox evaluation. Date hooks not applied: TypeError: can't convert undefined to object

and here's what i get dumped to the console (marked as message, not warning):

[03-22 21:41:30] Torbutton WARN: Hook exception at: http://www.pps.jussieu.fr/~jch/software/polipo/, TypeError: can't convert undefined to object

after every such warning. after the page is loaded this message:

[03-22 21:41:57] Torbutton NOTE: Got a tab with no extension data?

is dumped every few seconds.

Trac:
Username: woo