Unicode problem in front-end searching with 2 unicode chars

This is like a Lotus client bug (i`ve 6.5.6 and tried on 7.0.3)

When you add name, ex: Ğoran Şamil and try to search this in view (using CTRL-F), or try to make view.getdocumentbykey, or try to make dblookup - it will return error.

Ğoran Şamil, ĞŞ, Ğş, ğş - it is not matter, these 2 chars make me sad. If theyre in the 1 phrase, I cant to find it.

Back-end searching is working normal (view.ftsearch() or even search-in-view)

The same problem in the all databases, even in the names.nsf, not matter checkbox “Unicode chars” enabled or no, because All other situations with unicode chars are working.

And I found that the same problem with:

İŞ, İş (but iş is working)