see issues 17302/17242/17227 String>>findString:startindAt:caseSensitive appears to be failing for extended charsets String>>compare:caseSensitive seems to be failing for extended charset comparisons String>>beginsWithEmpty:caseSensitive: has test failure for some cases the problem is, the standard character set used for building the CaseInsensitiveOrder map only maps characters from the set of ascii characters but it is used in the findString/compare/beginsWith-methods for all byte characters. Any objections if we fill this map like it is suggested in case 17242 ? CaseInsensitiveOrder := AsciiOrder copy. (0 to: 255) do:[ :v | | char upper | char := v asCharacter. upper := char asUppercase. upper isOctetCharacter ifFalse: [ upper := char ]. CaseInsensitiveOrder at: char asciiValue + 1 put: (CaseInsensitiveOrder at: upper asciiValue + 1) ]. (the check for #isOctectCharacter is needed because for some entries the correspondending uppercase character is not within this character set). This would solve all three issues. nicolai