It seems like the problem is kind of described at http://www.mail-archive.com/users@racket-lang.org/msg18395.html
I was working long time and have got DrRacket "not responding" after 'New Tab' click. I use pre-release 32-bit version 5.3.5.900 on Windows 7 Professional SP1 64bit. Run DrRacket with 'racket -l drracket'. Console output: http://postimg.org/image/3mfihfthf/ _________________________ Racket Developers list: http://lists.racket-lang.org/dev