... <img alt="Next >>" src="../next_button.jpg" />*Boom*
And this is why you use a real parser, not just a regex . . .
Update: Just to clarify the above is a pathological case and if you're reasonably sure that it probably won't occur then go ahead and use the simple s///; but be aware that it's not bulletproof and know where to find the right tool when the sledgehammer doesn't cut it any more.
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