Erratic Sendkeys behaviour

VB6 app using sendkeys to post data into an oracle forms window. Behaves perfectly on some PCs , erratically on others. No particular pattern of failure , just randomly drops chars and gets tied in knots.

I've heard that DLL interactions can cause this?
also that a 'native compile?' may cure the problem. Any thoughts welcome.

Thanks

I'm sure that someone here has said before that SendKeys should be avoided like the plague, due to it's 'undocumented features'...