Sculpt brush missing size circle in 2.45.15+?

This is a fairly minor issue, but I wanted to confirm before reporting a bug. In none of the SVN builds or the recent 2.46rc1 does the brush-size circle show up when using Sculpt mode. I’m familiar enough with using it that I can work around this but there are times when it’s very handy to have that visual cue.

Anyone else having this experience? Thanks.
Windows XP Home, 5.1.2600 SP2 Build 2600
P4 2.5GHz
512Mb RAM
Nvidia GeForce FX 5200 256Mb
Forceware 93.71
Blender 2.46rc1
Python 2.5 full install

Thanks, Nick. Haven’t ever had to switch it on since v2.43 forward, so the new default befuzzled me.