Use of a4j:commandbutton vs h:commandbutton to present-new-pages in richfaces

I have completely substituted the h:commandButton with a4j:commandLink in my application for reasons not relevant to this issue. Since then I am seeing flaky peculiar side-effects in IE8 such as select menus that are losing focus and select items that cannot be selected.

Does anyone think that it is a bad idea to use a4j:commandButton instead of h:commandButton for some reason? Does anyone have any prior experience on this?

A开发者_开发问答ny answer is welcome.

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There is an issue when using a4j:commandLink for navigation in Firefox 3.5, as described here

JSF problem with FireFox 3.5 caching, wyciwyg:// prefix