Version:           0.9.3 (using KDE 3.5.8)
Installed from:    SuSE RPMs
Compiler:          4.2.1 
OS:                Linux

In the current version of digikam including plugins I did not find a way to copy all tags (as well as IPTC keyword data if configured) from one image to another with a simply copy/paste. 

Its no problem to set single tags on a large number of photos but its not possible to copy all the tags with just one copy/paste.

I need this regular if you think of a shooting where most photos have the same or similar subject and so share most of their tags. If you want to set say 20 tags set for each of 20 photo its quite hard to set each tag for each photo manually. Very time consuming. So it would be nice to have a way to simply copy all of them by something like copy-tags/paste-tags action.