Hi! I have exactly the same problem compiling Qwt 5.2 on windows with MinGW. I don't quite understand how to actually get the bugfix version mentioned - how do I "svn co https://qwt.svn.sourceforge.net/svnroot/qwt/branches/qwt-5.2" ? Sorry to be a dope - would really like to try Qwt out it looks like exactly what I'm looking for.