REAPER 3.0
-> switch ruler display format to "Samples"
-> zoom in horizontally
-> draw a selection of 3 samples or more
-> place the cursor into the "Lenght of time selection" field in the right corner of the transport bar
-> enter "1" (without quotes)
=> time selection gone
("2" samples sometimes works, sometimes not)
NO BUG http://forum.cockos.com/project.php?issueid=44