There is a little problem with the jmeter.bat that shift with the last nightly
build (29 mai). The last line should be changed to this :

%JM_START% %JM_LAUNCH% %JVM_ARGS% %ARGS% -jar "%JMETER_BIN%ApacheJMeter.jar"
%JMETER_CMD_LINE_ARGS%

Instead of 

%JM_START% %JM_LAUNCH% %JVM_ARGS% %ARGS% -jar %JMETER_BIN%ApacheJMeter.jar
%JMETER_CMD_LINE_ARGS%

Because if the %JMETER_BIN% env var contains space, it will fail (it will try to
launch the jar file c:/documents, etc).

Using "" will correct that thing.