Peter Wilson writes:

I have uploaded mempatch.sty to UK incoming. Please use this to replace 

the current /macros/latex/contrib/memoir/mempatch.sty.

Version 3.8 of mempatch fixes a problem with booktabs related code (see 

thread Bug in booktabs' trim command?, 5 March on CTT).

i have installed the file as requested; thanks for the upload.

Robin Fairbairns

For the CTAN team