RE: High volume, 3 buy ratings, stable price !Probably some of each. You will get a T slip from all the income trusts you are in and they will tell you how to treat distributions for tax purposes. Return of capital just reduces the adjusted cost base of your units. Otherwise they can be treated as dividends or as interest.
Go to the Yellow Pages site and there is probably something that will dreak down how the distributions are allocated. 2006 may not be up yet but you can get a pretty good idea by looking at the 2005 data.