No issues on my experience.

I once had the same issue with a rodent that died in the attic, and I called multiple pest control companies and they all told me the same thing - that all they could do was charge me to go up there and look for it in hopes of finding/removing it.

No major foundation issues.

Sometimes there are errors in public records (example: inaccuracy on a deed, unknown liens, forged documents, boundary issues etc).

I changed a water heater, huge leak in one of the units, electrical issues, and I even had to dig a 3 foot hole under the house and personally fix a pipe.

I think that may be because they have been so reluctant to press the issue until the economy improved though. 

If I can't deliver they know its a deal and I have to hand it over.The seller is happy too, he gets his real estate issue solved, though you buy at a discount, cash buys makes this much easier.

@Patrick Philip,Well, banks are "flush with cash" these days, but no, they do not have unlimited funds.Also, when banks lend, they impose certain restrictions on the loans, the borrower, the collateral, the terms of the loan, etc. so the note can be sold in the secondary market or be insured by government-sponsored agencies like Fannie Mae, Freddie Mac, etc.Private lenders ("OPM") typically don't write loans to sell them, and typically are interested in the deal rather than the borrower's details.Using OPM down usually means putting some kind of partnership, joint venture, etc. together so the source of the down payment is less of an issue or a non-issue to  the lender(s).Dunno if that helps...

If it's just a single family home you could look at getting a million dollar umbrella policy to cover any issues. 

Interesting, especially the issue of potential conflict of interest.Disclosure is important here