[xwiki-users] Non-ascii hibernate versioning problem

Hi. I have a problem with hibernate versioning of non-ascii characters. I'm following all recommendations from http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Encoding (database Postgresql, DB's locale pl_PL.UTF-8), but it does not work - there is always a problem with viewing old versions (see http://jira.xwiki.org/browse/XWIKI-7539). I'm wondering, if it is possible, that nobody else has that problem. I've tried with xwiki 3.4, xwiki 3.5, even with xwiki 3.3 launched with empty postgresql database versioning does not work correct. The only properly working installation is my old, many times upgraded xwiki database, where in xwr_patch column of xwikircs table are stored patches for previous doc versions. All installations where xwr_patch contains number of large object have problems with versioning. Any help will be appreciated. R.