Any recourse against Lenders practicing predatory behaviour? 

We knew what we were getting when we bought the property - well, the animal damage part; the Jekyll & Hyde behaviour at the end was just additional drama.   

You may be better off letting them move on when their lease expires, if they are going to be high maintenance.As others have suggested, do repairs if something isn't functioning, but "updates" where you are improving the condition of the property I would reserve for a reward for good tenant behaviour over an extended period (repair the leaky faucet when it leaks, but reserve the replacement of a faucet with a spray nozzle for when they renew their lease, for example).  

What are the interpersonal tricks?

To be successful in real estate, you need to be detail oriented, a quick learner, and have excellent interpersonal skills.

Watch for behaviours of desperation and trying to convince you that they are good people.

I also have firefox - on four different platforms - amongst my selection of browsers and am seeing similar behaviours with it as I am experiencing with Safari and Chrome.In general things are usable - with a small amount of retraining - but I'm sure there will be some tweaking in the coming weeks.If both the website and the browsers used conform to the W3C specifications and pass the test suites, then there should be little to no issue with a browser "working" with BP.

With the peek of the technology boom in real estate it still doesn't change the fact that real estate is an interpersonal/relationship-based business.

That's a behaviour that has stopped many from a life of prosperity and happiness.

I'm interested in picking up a book to improve my interpersonal/networking skills as well sales and marketing skills.