Problem with zcat uncompressing man pages

[Jamie Paul Griffin]

Hi

When I read 'certain' -- not all -- man pages zcat writes a small error to stderr when opening the man page; however, the man page does actually open. The message i get on the terminal is: 

	zcat: error writing to output: Broken pipe
	zcat: /usr/local/man/man5/muttrc.5.gz: uncompress failed

When closing the man page, another message is shown on stderr:

	grotty:<standard input> (<standard input>):54131:fatal error: output error


Would anyone here know the possible cause and fix for this issue?

Best wishes, Jamie.