When using up-arrow to retrieve the last executed command, or browse my history, each command becomes suffixed with a few lines worth of spaces. It's annoying having to backspace over this many spaces or manually move the cursor to perform edits. I'm currently using R 2.10.10 GUI 1.30 on Mac OSX 10.6. If I retrieve a command from my history using the history interface, the spaces are included. I dont remember the root cause of this-I don't think it was brought upon by an upgrade. Here are things I've done to try and troubleshoot: reset all of the settings I could find from within R delete my workspace delete any hidden files delete the command history file delete my preferences completely remove/uninstall R upgrade from 32 to 64 bit R somewhere along the lines I missed a preference or a hidden file. Here's a screenshot showing the issue. The screenshot was taken immediately after pressing up-arrow. http://www.neilkodner.com/images/skitch/R_mystery-20091229-093157.jpg Hopefully someone knows what to do about this. [[alternative HTML version deleted]]