[pmwiki-devel] Error message

[Simon]

I've been testing on Windows, all good. Uploaded to my host (linux)
and I get this error

PHP Warning:  Cannot modify header information - headers already sent by
(output started at
/home/ttcorgnz/public_html/pmwiki/cookbook/extract.php:1) in
/home/ttcorgnz/public_html/pmwiki/pmwiki.php on line 1240

I've not had this happen before.
I checked the download and upload of extract.php (e.g. opened it with
notepad++ and saved to check encoding).

Any ideas would be appreciated, in the meantime I've had to comment it out

tia

Simon
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