I believe this may cause duplicate content issues.
If possible, remove the link to the printer friendly version from the printer friendly pages.
http://www.websitename.co.uk/index.php?pageid=7 would have a link to printer friendly page.
http://www.websitename.co.uk/index.php?pageid=7&printfriendly=yes If &printfriendly = true, do not display the link.
Also ensure you're using rel=canonical to show that http://www.websitename.co.uk/index.php?pageid=7 is the actual page that should be indexed. The following should be placed in the head tags of the printer friendly page: