[Shotwell] Today, Shotwell can not upload photos to FB

[Erasmo Perez]

dear list:

today, Shotwell can not upload photos to Facebook, but yesterday I could
upload ~ 200 pics to the same FB account.

I am using revision 2413 (trunk), Linux 64 bits

the dialogue box says (after the uploading has been completed) that: "The
selected photos were successfully uploaded", but no new picture shows at all
in the FB album

why on earth do I get this behaviour?

thank you very much