umlauts in DC elements

Dear list,

we are using Lenya Apache Lenya 2.0.2 on Linux. All encoding configurations in sitemap.xmap are set to UTF-8.
If we are putting german umlauts like ö, ä, ü in DC elements, e.g. in the description element, then we get problems after saving and displaying meta data page. All umlauts are displayed as "?". In addition, if we are searching (using Lucene) for strings that contains such umlauts, the appropriate pages are found. But the strings that we have searched for are  displayed with a "?" too.

A second problem is that we cannot make changes on the DC elements that contain umlauts. A popup occurs saying "value can't be saved, concurrent change detected".

Thanks in advance,

Lars