With Digikam 4, for tagging my photos I used what is labeled "the keyboard way" in this description: http://www.digikam.org/node/641 
Now with Digikam 5.2 it seems no longer possible to save changes and move to the next image by hitting the "page down" key on the keyboard after assigning all the desired tags.
Another problem: When I start typing the desired tag, a list of matching tag suggestions appear. With Digikam 4, I would use the "Tab" key to jump to this list of tag suggestions. This also does not work with Digikam 5.2.

Reproducible: Always

Steps to Reproduce:
1. Tag photos as described in http://www.digikam.org/node/641 "The keyboard way",
2. enter the first letters of the desired tag in the first box from the top,
3. use "tab" key to jump to tag suggestion list and select a matching tag, then hit "enter",
4. use "page down" key to save changes and move to the next image

Actual Results:  
Steps 3. and 4. do not work.

Expected Results:  
Steps 3. and 4. should work as described in http://www.digikam.org/node/641 "The keyboard way"