On Mar 30th 2014 AMSA reported that an emergency signal received from a fishing vessel about 3300km/1780nm southwest of Perth needed to be addressed, two aircraft thought to participate in the search for MH-370 were tasked to respond to the fishing vessel - as only debris was located at the point of the signal, the search for the vessel is going to continue on Mar 31st. The remaining 9 aircraft and now 8 ships continued to scan the northern search area west of Perth, aircraft reported new sightings. The objects retrieved from the ocean yesterday have been described as "fishing equipment and other floatsam" unrelated to MH-370.
Apparently at least some objects have been examined.