Just that.
I am a woman! I run our household. My husband works and I don't; I've recently given up to take care of our three young DC (not that that should matter but to some it will).
We are selling our house and buying another and I am in every dealing with our sale, purchae, survey, mortgage, solicitors etc....
I don't mind this - to some extent since giving up work, it gives me something else to do.
However, when getting agents in to value our house prior to putting it on the market, a direct question as to how much there fees were, was deflected saying we need to speak to the man of the house! 
This happened three times! They all insisted on speaking to my husband first who then said "err, my wife is dealing with this, speak to her, she can sort it out thanks"
Then today, I rang up to arrange a viewing of a house we are interested in only to be asked what mine and OHs initials are to which I responded A and B Chicletteeth (a being me since he asked me)
So he then said so you are Mrs. B Chicletteeth then?
No, I'm bloody well not - and why would you think that unless you are 60+ years old (he wasn't)
This may seem petty and I have in the past dealt with this from patients who say can I speak to my real doctor (i.e. you're too young/blonde/ etc...)! But WTF andwhy oh why does this still happen?
I'm annoyed, my husband in agreement that this is wierd behaviour from the estate agents (all male ) but has this happened to any of you and does it piss you off?