in ImageJ 1.50b the sort function of the ROI doesn't work.
After changing the ROI names, it 's not possible to sort the ROI by name in the ROI manager.
The function"sort" change each time the order but never give the name ordered. It give and order  then a second then a third and back to the first.
The same procedure function in ImageJ 1.49

have a good day
pierre

Information about your version of Java:

  os.arch => amd64
  os.name => Windows 7
  os.version => 6.1
  java.version => 1.6.0_24
  java.vendor => Sun Microsystems Inc.
  java.runtime.name => Java(TM) SE Runtime Environment
  java.runtime.version => 1.6.0_24-b07
  java.vm.name => Java HotSpot(TM) 64-Bit Server VM
  java.vm.version => 19.1-b02
  java.vm.vendor => Sun Microsystems Inc.
  java.vm.info => mixed mode
  java.awt.graphicsenv => sun.awt.Win32GraphicsEnvironment
  java.specification.name => Java Platform API Specification
  java.specification.version => 1.6
  sun.cpu.endian => little
  sun.desktop => windows
  file.separator => \

The up-to-date check says: CHECK_TURNED_OFF

Information relevant to JAVA_HOME related problems:

  JAVA_HOME is set to: C:\Users\FORMAT~1\Desktop\IJMACR~1\FIJI-W~1\Fiji.app/java/win64/jdk1.6.0_24//jre
  imagej.dir => C:\Users\FORMAT~1\Desktop\IJMACR~1\FIJI-W~1\Fiji.app

Information about the version of each plugin:

Activated update sites:
ImageJ: http://update.imagej.net/ (last check:20150915084157)
Fiji: http://update.fiji.sc/ (last check:20150916133657)

Files not up-to-date:
  ac6b9cd1 (MODIFIED) 20150923102510 jars/ij-1.50b.jar
  03c11e39 (LOCAL_ONLY) 20150923130612 macros/toolsets/04-circle-tool.ijm
  25977a37 (LOCAL_ONLY) 20150922105054 plugins/LOCI_spirale-ex11-2.ijm
  61d3919e (LOCAL_ONLY) 20150922105054 plugins/_spirale-ex11-2.ijm