Why has my Google PageRank been lowered?

My blog has had a page rank of 3 for ages now, but more recently its gone down to 1.

I have no idea why, all the incoming links that I have are still there and nothing has changed.

I update the site and always use the blogging software correctly.

One thing that really pisses me off about Google is they do what they want when they want and the dont inform you about it. Why is this? Its not fair at all !!!

This is not the only problem I have had lately, I have been trying to sort out Google AdWords and have had some issues with the ads displaying.

I have emailed them TWICE now, once of which was over a week ago and have still not had a reply, its disgusting.

I have a business to run google and I cannot wait this long for answers, its absolutely ridiculous.

Anyone else had problems with Google? Please do share !!!!