Yes, the trouble was that I -- ignorantly? -- hadn't been aware of the connection between Google+ and Picassa, though I would not be against the redistribution of my images by Google under the same terms. What did bother me though were the default terms that Google had -- automatically? -- associated with the images they migrated from Google+ to Picassa.
Google+, strangely, does not seem to have any easy to find way to manage rights, a basic feature of any decent content management system -- although it would be reasonable to expect that material uploaded to Google+ is covered by Google's standard terms of service, which to my knowledge respects copyright. Piccasa, on the other hand, lets one set the rights for each image, although with very few options: no reuse (All rights reserved.) and reuse (Creative Commons). The issue I have with the migration of my images from Google+ to Picassa is with what appears to have been the modification of the image rights.
My images as uploaded to Google+ are `Copyright © &c.. All rights reserved.' The images that Google kindly published for me through Picassa defaulted to Creative Commons with the additional option of allowing viewers to order prints of my images from external suppliers (with whom I have no association).
Although some people on this list appear to be trying to play down the significance of this migration and what appears to have been the attendant `adjustment' of the image rights, I believe it is an issue which should cause us great concern. Unless one can be assured that one will always have the ability to manage the rights associated with all material provided to external web sites I think it would be very imprudent to use them.
>>The images that Google kindly published for me through Picassa defaulted to Creative Commons<<
Oh my! So I can incorporate your work on web sites and products, heck, web advertising without even telling you, the photographer, let alone paying you? Google+ is Plus indeed!
Per a number who have checked it out Google Plus strips all ID info from digital photos you put up on the site. Beware as those who may look can not find out who the images belong to as all copyright and other info is gone.