I checked and wasn't able to see Record Matches or Search results for the NewspaperARCHIVE collection, so I emailed Daniel and Mark of MyHeritage last night with the hope that this was something planned and not random, or, even worse, if the collection was no longer available.
Mark sent this email note early today:
"The NewspaperARCHIVE collection on MyHeritage is temporarily disabled because NewspaperARCHIVE are moving imminently to another data center. We have an index but rely on them for serving the newspaper images. All Record Matches are intact and will come back after their data center move is completed."
My thanks to Mark for the very quick response and the assurance that the collection will return soon.
It may be that the same problem will arise on Ancestry.com and Findmypast.com, since they also access the NewspaperARCHIVE collection, although they don't include the collection in Record Matches or Hints.
UPDATED 25 March 2016: I checked again today, and the NewspaperARCHIVE collection is again listed in my Record Matches and search results.
Copyright (c) 2016, Randall J. Seaver