What Came Off Strela During EVA?

What Came Off Strela During EVA?

About 36 minutes into the EVA, as Gennadiy Padalka
had nearly completed his traverse along the Strela boom,
hauling an equipment bag, to join Mike Fincke,
a white slowly-tumbling book-sized object appeared
to detach from the Strela arm about 2 meters from its base
on the Pirs module, and translate rapidly up and to the
right, as viewed by the keel camera.

Had something gotten stashed there, and broke loose
as the boom flexed during Padalka's hand-over-hand along
it, or was it part of broken-off existing structure? Was anything noticed
by the crew or MCC and remarked on, when they returned along it?
Has any mention been made of it by ground teams?

Most station-generated and shuttle-generated stuff is
just junk, but once and awhile, it can be a critical piece
of equipment, or an indication of failure of a critical piece
of equipment (e.g., the hunk of broken RCC panel that drifted away
from Columbia after a day in space, that spelled doom for the
mission but wasn't noticed visually, and was only seen on
radar records examined after the catastrophe). Not to say
this object is anything as critical -- but it's curious and unusual
enough to inquire about.

JimO
www.jamesoberg.com