In response to problems with some of the new High-Definition players, Toshiba has released a firmware update.
According to Toshibahddvd.com, this firmware V1.2 update applies to the HD-XA1, HD-A1 and the HD-D1.
The site goes on to explain that this update "addresses certain disc playback and HDMI/DVI related problems identified by Toshiba."
This update can be obtained via the Ethernet port on the back of the HD player or you can contact Toshiba Customer Solutions and they will send you a "firmware update disc."
The site also answers questions about installing the V1.2 firmware update.