Version: (using KDE KDE 3.5.5) Installed from: SuSE RPMs KSpread 1.6.1, xls from Windows (Excel probably). I guess there is no conversion CP1250->ISO885992. OOCalc works fine here.
can you attach such a document to this bug report? I don't have excel around to test it with.
I am not sure this the same file, but it contains polish characters so it should be enough.
Created attachment 30434 [details] xls with polish characters
this seems to be fixed in the latest kspread 2 beta.