Can optimizing for Bing and Yahoo effect Google PR

[peaceandkarma]

Can optimising for Bing and Yahoo, have a detrimental effect on my Google page rank. Has this happened to anyone before?

[deepsand]

Please do some independent research before posting questions, so as to avoid needless revisitation of the basics.

A quick reading of, for example, PageRank (http://en.wikipedia.org/wiki/PageRank), will suffice to show that Google PageRank (PR) is wholly independent of all but the numerical counts of links.