This is very minor gripe about the fact that POCO source files contain the TAB character for indentation. The TAB character means different things to different people, editors and printers. In general, none agree. That is why, IMO, it is better not to employ the TAB character in source files. Just google for "tab character evil" to see all the arguments against the TAB character. But I will add that it is a problem for projects where more than one person will work on the code, or when people other than the original author may wish to contribute to the code.