I am a new QGIS user, have installed QGIS on a Mac running Snow Leopard OSX 10.6.8 following all the instructions. QGIS seems to work well for everything other than when I boot up I get the message "Unable to load the plugin: Unable to load required package rpy2. Please ensure that both R, and the corresponding version of Rpy2 are correctly installed".
I have installed Rpy2 several times and reloaded R. I have R version 2.15 loaded (but also RStudio).
Does anyone have any ideas?