Thanks for the reply, but no joy. I did already have the settings you mentioned, set (and unset and pretty much all other combinations thereof).

Seem that it is an added "feature" of Olly, although I did notice that it doesn't seem to happen with OllyV2, so will just have to live with the minor inconvenience of it, for now,
or at least until V2 becomes as handy as the original (it's not as if I use half of the features of Olly, but V2 just doesn't seem complete somehow)