Shimano has identified that the rear protrusion tab may become damaged, and may prevent the shoe from being released from the pedal. This could lead to a cyclist being unable to release the cleated shoe from the pedal, says a voluntary recall notice from Shimano.
"There have been no reports of accidents or injuries resulting from this problem. However, as the product does not appear to meet Shimano’s usual quality standards, and in an abundance of caution, Shimano has decided to conduct a voluntary recall of this product and offer its customers free replacement cleats, or a discount on the purchase of the new model pedal system for those customers for whom the alternative cleats are not convenient and those who prefer to use our most updated system (SPD-SL)," says the recall notice.
"We would like to emphasise the fact that this recall is only for the optional SM-SH92 SPD-R cleats with a total float of 10 degrees. Standard SM-SH91 (6 degrees total float) and the after market product SM-SH90 fixed cleats are not affected by this recall."
Shimano said consumers with the recalled cleats should "go to your local Shimano dealer without delay to receive replacement cleats free of charge or to receive a discount of 20 EUR in the purchase of a pair of SPD-SL pedals (PD-7800, PD-R600 or PD-R540). Please note that if you wish to choose the option of the discount, you will need to submit your claim before the end of July 2004. The free replacement cleats will continue to remain available after that time."
PDF of identification and remedy: