Version:           unspecified (using KDE 4.7.1) 
OS:                Linux

I like to know the full frame focal length of my images, but for most lenses this data is not readily available in the metadata.
It is easy to update the respective field (focalLength35 in table ImageMetadata) with a SQL statement (e.g. UPDATE ImageMetadata SET focalLength35=focalLength*1.6 WHERE model LIKE 'Canon EOS%' AND focalLength35 IS NULL;). This metadata is then presented in the info tool (mouse hovering) in digikam. 
I would like to write this data back to the files (Menu: Image->Write Metadata to Image) after doing the same selection of photos in digikam, but it doesn't work. I have to edit images individually with Image->Metadata->Edit all metadata.

Reproducible: Always

Steps to Reproduce:
Image->Write Metadata to Image


Expected Results:  
Image->Write Metadata to Image should write the focalLength35 field back into the exif data of the image files.