‘Income from capital’ and Assessed Income Periods

During an Assessed Income Period (AIP), a PC claimant is not required to notify changes of certain types of income including ‘income from capital’. I’m always a little confused by what this means because most types of income from capital, such as actual interest on savings or income from property rented out, are disregarded in means-tested benefit assessments anyway. Does it mean that changes in capital itself, which would normally lead to changes in deemed income from capital, do not need to be notified during the AIP?

In particular, if during an AIP a PC claimant who owns their home (which is therefore disregarded as capital) sells it and rents somewhere else, is the capital they acquire from the sale (which would normally no longer be disregarded) still not taken into account? 

http://www.rightsnet.org.uk/forums/viewthread/4464/

This thread may help