So, encouraged by your replies (many thanks for them) I installed the KPW1 FW Update 5.4.4.2 and I can confirm that all features that I mentioned in my previous posts here seem to be working fine.
Just for the record ... that means:
1. when you look up a word in the dictionary, you can view the full definition in the "small" dictionary definition window (a scrollbar appears when needed, introduced in the KPW1 5.3.5 firmware)
2. when you look up a word that has multiple meanings for the same spelling (homonym), you can navigate through each of the available definitions from within the "small" dictionary definition window ("<" and ">" buttons appear when needed, introduced in the KPW1 5.3.8 firmware)
3. when you look up a word in the dictionary, you can choose to look up the word in other dictionaries on your device from within the "small" dictionary definition window (introduced in the KPW1 5.3.8 firmware)
I've got a question to "tomsem". What do you mean by "dictionary cascade"?
It seems I am missing something that I haven't even heard about!