iWork09 is lame...

because it won't let me save as anything older than the the '08 version. Like, what if I need to send a slide to someone who only has a version of iWork that is older than 08? Actually, i just did. and i ended up having to save it as a static pdf and loose the animations.

Gnuplot does not work as well

Gnuplot does not have the functionality that it did in linux. Lots of display windows for graphs pop up and never go away (aquaterm) when gnuplot is closed. The terminal does not indicate when the plotting is done (by giving a new prompt.) And no buttons for instant autoscale and no dragging to zoom. Fairly annoying since this is one of the apps I use most. Locked in aspect ratio on graphs.