yes, the denon 2800 was the same.
not exactly sure what the max length was, but looked more like 20+characters, certainly more than an 8.3 filename.
since the player cached the directory structure of the CDRW, you can browse the disc whilst playing which I thought was a nice feature.
the denon 2800 only worked with the first session of a CDRW, the sony with multiple sessions according to the manual which is another plus.
all in all, for audio CDs, MP3s and general video quality, the Sony 905 looks pretty good to me.
the lack of component out is the only flaw really.