Things are getting confusing. This is not a replacement for version 1.4.2, posted a few days ago and subsequently withdrawn: 1.4.2 addressed external hard disks; 1.4.1 targets external DVD writers. In fact, LaCie posted LaCie DVD update tool 1.4.1 on 14 February. VersionTracker logged it around 22 February. The current download, although renamed, and currently filed on LaCie's site under support and downloads for hard drives, is identical to the DVD updater posted in February.

So, if you want a DVD updater, 1.4.1 is what you need. If you're waiting for the hard drive updater to be reposted, sit on your hands while LaCie gets its act together.

For what it's worth, I used DVD update tool 1.4.1 to flash my DVD drive a couple of months back, and have had no problems, then or since.