Merge Dictionaries Broken in FM 10?

[Mike Wickham]

The dictionary merging feature seems to be broken for me. In the 
spelling checker dialog, I used Dictionaries> Personal Dictionary> 
Import Dictionary to import a dictionary. It replaces whatever personal 
dictionary is in place, as expected, and works fine.

I have a second file of new words that I would like to add to my 
personal dictionary, but when I use Dictionaries> Personal Dictionary> 
Merge from File, the words are not added to my personal dictionary. A 
dialog pops up, allowing me to specify the file to merge, but after 
specifying the file, nothing happens and no error message displays.

In both cases, the dictionary file is a plain text file with 
"<MakerDictionary 3.0>" on the first line, each word on a separate line, 
and hyphens in appropriate places.

Does anyone else see this behavior? Is it a bug, or am I doing something 
wrong?

(Using FrameMaker 10.0.2.419 on Windows 7 Ultimate 64-bit)