When there are parameters in the requestURI property of <display:table>, there are indefinitely concatenated at each sorting, paging ...
For example if my property is defined as :

requestURI="/foo/bar.do?method=search"

after three sorting my URL looks like

/foo/bar.do?d-49653-o=2&d-49653-p=1&d-49653-s=1&method=search&method=search&method=search&method=search

More serious, if my first URL is something like "/foo/bar.do?method=init", the requestURI has no effect, since the URL looks like
/foo/bar.do?d-49653-o=2&d-49653-p=1&d-49653-s=1&method=init&method=search

and my parameter method=search is not taken ...