Google A clean-up has begun within the projects that have been maintained so far, and among those that ended up in the garbage is Picasa guidance on GNU / Linux.
In google blog you can see the official announcement:
We launched a WINE-based version of Picasa for Linux in 2006 as a Google Labs project. As we continue to enhance Picasa, it has become difficult to maintain parity on the Linux version. So today, we're deprecating Picasa for Linux and will not be maintaining it moving forward. Users who have downloaded and installed older versions of Picasa for Linux can continue to use them, though we won't be making any further updates.
Which more or less translates to something like this:
In 2006 we released a version of Picasa based on WINE as a project of Google Labs. As we continue to improve Picasa, it has become difficult to maintain parity in the version for Linux. So today, we are throwing away Picasa guidance on Linux. Users who have downloaded and installed previous versions of Picasa guidance on Linux they can continue to use them, although we will not release any subsequent updates.
You really don't have to make a drama out of this, since in GNU / Linux we have similar applications like Shotwell guidance on Gnome y digiKam guidance on KDE, but hey, whatever it is, it is a limitation for all those users who want to use Picasa en Linux.