I use an inputComboboxListOfValues in an ADF page fragment (.jsff) like the following:

When I clik on “Search…” I can type what I’m looking for, but here the search is case-sensitive.
How can I set up this field case-insensitive?
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http://dkleppinger.blogspot.com/2010/06/case-insensitive-search.html. Also, you could try setting up a case insensitive view-criteria and apply that to the LOV in the UI hints panel of the LOV setup.