[Moved to DR at the October, 2012 meeting.]

Proposed resolution (February, 2012):

Change 12.2.2.2.3 [over.call.object] paragraph 2 as follows:

In addition, for each non-explicit conversion function declared in T of the form

operator conversion-type-id () attribute-specifier-seq_opt cv-qualifier
ref-qualifier_opt exception-specification_opt attribute-specifier-seq_opt ;

where cv-qualifier is the same...

In 12.2.2.2.3 [over.call.object] paragraph 2, the non-explicit conversion functions considered for producing surrogate call functions are those of the form

operator conversion-type-id () attribute-specifier-seq_opt cv-qualifier ;

This (presumably inadvertently) excludes conversion functions with a ref-qualifier and/or an exception-specification.