trouble uploading on ubuntu 12.04

Development Tools IDE 1.x
11

First I checked for the lock, then removed it, then verified the lock was gone, then started the Arduino IDE, then closed the arduino IDE w/o trying to upload anything, checked for the lock, and finally started the IDE and tried to upload Blink.

Here I'm using Arduino IDE 1.0.1 from the repo.

$ ls /var/lock
LCK..ttyACM0  multiload-icons-PwgnzL  whoopsie

$ rm /var/lock/LCK..ttyACM0 
rm: remove write-protected regular file `/var/lock/LCK..ttyACM0'? y

$ ls /var/lock
multiload-icons-PwgnzL  whoopsie

$ ./arduino
Experimental:  JNI_OnLoad called.
Stable Library
=========================================
Native lib Version = RXTX-2.1-7
Java lib Version   = RXTX-2.1-7

$ ls /var/lock
multiload-icons-PwgnzL  whoopsie

$ ./arduino
Experimental:  JNI_OnLoad called.
Stable Library
=========================================
Native lib Version = RXTX-2.1-7
Java lib Version   = RXTX-2.1-7
Binary sketch size: 1,084 bytes (of a 32,256 byte maximum)
processing.app.SerialException: Error opening serial port '/dev/ttyACM0'.
	at processing.app.Serial.<init>(Serial.java:178)
	at processing.app.Serial.<init>(Serial.java:77)
	at processing.app.debug.Uploader.flushSerialBuffer(Uploader.java:77)
	at processing.app.debug.AvrdudeUploader.uploadViaBootloader(AvrdudeUploader.java:172)
	at processing.app.debug.AvrdudeUploader.uploadUsingPreferences(AvrdudeUploader.java:67)
	at processing.app.Sketch.upload(Sketch.java:1706)
	at processing.app.Sketch.exportApplet(Sketch.java:1662)
	at processing.app.Sketch.exportApplet(Sketch.java:1634)
	at processing.app.Editor$DefaultExportHandler.run(Editor.java:2346)
	at java.lang.Thread.run(Thread.java:679)
Caused by: gnu.io.UnsupportedCommOperationException: Invalid Parameter
	at gnu.io.RXTXPort.setSerialPortParams(RXTXPort.java:171)
	at processing.app.Serial.<init>(Serial.java:163)
	... 9 more
processing.app.debug.RunnerException: Error opening serial port '/dev/ttyACM0'.
	at processing.app.debug.Uploader.flushSerialBuffer(Uploader.java:101)
	at processing.app.debug.AvrdudeUploader.uploadViaBootloader(AvrdudeUploader.java:172)
	at processing.app.debug.AvrdudeUploader.uploadUsingPreferences(AvrdudeUploader.java:67)
	at processing.app.Sketch.upload(Sketch.java:1706)
	at processing.app.Sketch.exportApplet(Sketch.java:1662)
	at processing.app.Sketch.exportApplet(Sketch.java:1634)
	at processing.app.Editor$DefaultExportHandler.run(Editor.java:2346)
	at java.lang.Thread.run(Thread.java:679)