Problem with Han character in ICUFoldingFilter

[eyal.naam...@exlibrisgroup.com]

Hi,

I was wondering if anyone ran into the following issue, or a similar one:
In Han script there are two separate characters - 宅 (FA04) and 宅 (5B85).
It seems that ICUFoldingFilter converts FA04 to 5B85, which results in the 
wrong character being indexed.
Does anyone have any idea if and how this can be resolved? Is there an option 
to add an exception rule to ICUFoldingFilter?
Thanks,
Eyal