running PB on a Samsung NC10 with 2gb of Ram. Works like a charm for small to medium-sized brains. I've removed all windows decorations which might get me in trouble sometimes (java-issue, setting _JAVA_OPTIONS='-Dawt.useSystemAAFontSettings=lcd -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel -Dawt.toolkit=sun.awt.motif.MToolkit'" solves most of my issues under Linux) but gives me more screen estate.
Also: The preferences dialog is kind of too large and i need to move the window with Alt-Click-Drag which works fine.
Another issue: When using two screens and dragging PB from the larger to the smaller, it doesn't recalculate sizes and can't be maximized according to the actual screen estate available. Might be a java issue.
Apart from that, it works nicely since i've upgraded to 2gig ram..
-- 184.108.40.206 (220.127.116.11) on Mac OS X 10.12.6
Old enough to remember Natrificial times...