Version: 3.5.2 (using KDE 3.5.2, Kubuntu Package 4:3.5.2-0ubuntu18 dapper) Compiler: Target: i486-linux-gnu OS: Linux (i686) release 2.6.15-22-k7 Backtrace: Change to List-View in Konqueror. You have to have two folders and one file in the current directory. Press Strg and hold it. Drag the file into the first folder without releasing Strg. Now drag the file into the second folder while still pressing Strg. If you haven't released Strg until now you get an error message saying something like "The clippboard is empty" ("Die Zwischenablage ist leer" in German). Doing this in Icon-View is impossible because you have to release Strg to be able to drag the file into the second folder.
I can't reproduce this bug in Konqueror/Dolphin of KDE 4 (svn trunk r858256).