Comment #1 on issue 3601 by Torsten....@astares.de: Recommended Seaside version in Pharo-1.2 outdated http://code.google.com/p/pharo/issues/detail?id=3601 Seaside loads and runs when I use the 3.0.3 version: ((Smalltalk at: #ConfigurationOfSeaside30) project version: '3.0.0-alpha5.15') load. but I get 5 failing tests (WAFileLibraryTest and WAPharoFileLibraryTest fail) since GRPharoPlatform>>useByteArrayLiterals uses "Preferences": useByteArrayLiterals "whether ByteArray literals can/should be used" ^Preferences valueOfFlag: #compileUseNewCompiler ifAbsent: [ false ] and there is WAPharoLibraryTest>>hasNewCompiler too: hasNewCompiler Preferences valueOfFlag: #compileUseNewCompiler ifAbsent: [ ^false ]. ^true and there is a (IMHO redundant) WAPharoLibraryTest>>compileUseNewCompiler: compileUseNewCompiler ^Preferences valueOfFlag: #compileUseNewCompiler ifAbsent: [ false ]