I have installed
Picasa 3.5 in ubuntu by some of the ways mentioned here, I wonder if similar can be done for installing
Picasa 3.8? Anyone tried this before? If yes, what will happen to the facetag (facial recognition) already present in
Picasa for Ubuntu is basically a windows install of Picasa running in a custom install of wine (allowing system wide access). The webupd8 article describes how to install the official version of Picasa, do a default "user" install of Picasa with a newer version (which is not supported by the officiial installer yet) then copy the newer user install over the older official one.
As an added bonus, many Ubuntu users are finding that this process fixes a bug that crept in during the roll out of Google+ as documented on the Picasa Forums.