[Mediawiki-l] incomplete import

[Emanuele D'Arrigo]

Greetings,

I'm trying to import a file of approx 1 Megabyte (1014 KB to be precise)
but the import stops around 20% of the way and returns a blank page.
I've been able to exclude a few things:

1) this isn't a problem with the import: it works with other (smaller) files.
2) it isn't a problem with PHP limits: they are set to 2 MB
3) it isn't a problem with the hidden input field, also set to 2MB
4) it isn't a problem with the content of the file: the import stops at
around 20% of the way, but not on the same page every time.

Am I missing something?
Could it be a webserver timeout?
Could it be a MySQL timeout?

Thanks for your help.

Manu