RSS feed sends full blog occasionally with no updates

Hi all,

I have proposed to users to subscribe to an RSS feed of my blog through
BlogTrottr ( http://blogtrottr.com/ )

Every so often, without any blog activity on my side, BlogTrottr feeds the
entire blog (all entries) to my e-mail address (and presumably to all other
subscribers).

I'm not sure how to troubleshoot this, and whether the error lies with
Roller or with the BlogTrottr RSS client.

Is Apache Roller sending details for the entire blog every time the RSS
feed is requested? Is it up to the RSS client to decide which entries
should be e-mailed and which shouldn't, or is the server somehow involved
in the decision?

Also: I have a new feature request (after I resolve this problem). Would it
be difficult to mark certain updates as "minor" so that they don't get
included in the RSS feed (e.g. by not updating the publishing date)? I want
to avoid including a certain entry in the RSS feed if all I did was fix a
spelling mistake.

Rgds,
Assaf