What do you mean by \"failure\"? Is the whole file unreadable? Does the audio skip? Just curious. I have burned and mp3 encoded much of my collection and most of my problems (mainly skipping) were due to a jittery CDROM drive. Particularly old cds from the \'80s were troublesome. And they did show some scary signs of wear: it looked like the shiny stuff inside was beginning to flake away at the edges. I have much better CD ripping results with my DVD-/+RW drive, when the original CD is salvagable.
I\'ve never had problems copying things over wifi, other than transfer rates being slow as all hell. I used to have wierd file-corruption problems with USBDNET but i quit using USB with the Z because it\'s just too cumbersome.
As for problem with CDRs, are you burning on el-cheapo brand media at high speed? This can be a problem, esp. with old CD players/CDROM drives. Does your burning software cope well with long filenames? I have had problems on win XP and linux, even with Joliet, RR, and whatnot turned on, where \"CLASSICAL MUSIC MP3 AUTOMATICALLY NAMED BY SOME GUI RIPPER PROGRAM WITH RIDICULOUSLY LONG NAME FULL OF EXOTIC PUNCTUATION & OTHER THINGS CONFUSING TO SHELLS .mp3\" gets turned into \"CLASS.ICA\" or worse. Renaming the file to .mp3 fixes it but is a hassle.