[pmwiki-users] Page data can't exceed 1500 words

[PYG]

Hi there (me again :-/ )
I've a strange pb with a pmWiki2b36, and found nothing in the archives 
about this.

It's seem that I can't exceed about 1500 words (or about 10000 bytes) in 
the edit textarea. (I used the usefull http://www.lipsum.com to check 
the value)
I think it's a server limitation, not a PmWiki bug, but a phpinfo 
indicates that POST_MAX_SIZE = 40M (we need to host large files uploaded 
by html)

Could someone tell me which server variables I must check to bypass this 
limitation ?

Thx
pyg