I really think you should use:

    find ... -exec perl -lne "fancy stuff" {} +

because for one it doesn't mess with stdin, and for another you don't have to worry about filenames with spaces or newlines in them. I also like -execdir since if my script dumps any output to other files I'll probably want that output near the sources. And did I mention it does nothing if there are no matching files? I also think it looks better and is shorter.

If you really can't remember that or want to continue to pollute the environment with extra heat generated by running two cpus to do the job one can do, you should at least use -print0/xargs -0 because of spaces, and always use -r to more sensibly handle an empty result-set from find et al (gnu xargs runs once!)