Correct version of Blender 2.59?

Greetings all.

Can anyone please confirm I have the correct version of Blender 2.59 running.

I’m using Windows XP, on a 32bit single core Intel P4 2.66 ghz system.

When I start Blender 2.59, the python console says it is a 64bit version, yet I definately downloaded the 32 bit auto install version from

Raytracing is greatly improved, speed wise, but shadowmapping now takes 12 seconds for a simple scene, that renders at 4 seconds in 2.49a.

Interface also seems slower.

Is this speed drop just because of improvements or have I the wrong version?