Setting new mesh rings/segments in 2.5

Apologies if this is a duplicate; I haven’t been able to find an existing post yet.

In Blender 2.5, how does one set mesh properties such as sphere rings/segments, torus segments and other such on-creation attributes? Pre-2.5, adding a new mesh caused a dialog to appear where one could set those options. I can’t find those settings in 2.5. From what I’ve read, there is supposed to be a context-sensitive panel under Object Tools, but I’m not seeing it. I’m using 2.5.7b.

If you dont have the panel at the bottom of the toolshelf (T), you will have a small + symbol at the bottom right corner of the 3dview. press this to show the panel. You can also access the parameters by pressing F6 after you have added the object. These parameters can only be changed until you press Enter to accept the object.