Hi, Alex
Sorry about the slow response to your request.
I had a look at the postings you mentioned. The portuguese part consists of three articles from the "O Globo" newspaper.
The first one, entitled "To whom does the voice belong" reports that João Gilberto is sueing EMI, basically for three reasons. 1) They have reissued his early recordings without paying him. 2) They have authorized the use of his recording of "Coisa mais linda" in a TV commercial without consulting him, and 3) The remastering severely distorts the original recording. For the last point, three expert's reports are quoted which confirm that there are significant differences between the original vinyl and the remastered CD version.
The second article starts of by mentioning that EMI has treated the re-issue of Milton Nascimento's early recordings quite differently. It then reports the outcome of the court case. The judge condemned EMI to pay both for the re-issued songs and for the use in the TV commercial. On the question of the remastering the judge agrees that there have been significant alterations, but concludes that these differences would not be noticed by the average listener and lifts the ban on the sale of the CD that had been previously imposed. The article comments that this kind of logic takes away the artist's right do decide what happens to his/her work.
The third article is an extract from the comment by Caetano Veloso (a big name in Brazilian popular music), who wrote one of the expert's reports that support the case that significant changes where made. Caetano praises João Gilberto and his contribution to Brazilian music, clasifies the remastering desastrous and calls for the restoration of the original beauty of the recordings.
As far as the first three LPs by João Gilberto are concerned, I remember that when I signed up for this site, there was a rule about not posting links to download sites. I hope it's not against the rules to mention that all three albums are available for download, posted by people who convert original, out-of-print vinyl to mp3. I won't post the urls. But if you're interested drop me a line and I'll send them to you.
Gato