Zenphoto 1.6.4
mod rewrite ON
UTF8 image URLs ON

in plugins - SEO
all SEO plugins unchecked
if I check seo_null and click APPLY
then seo_zenphoto immediately gets a red mark and states:
Only one SEO filter plugin may be enabled. seo_null is already enabled.

What is causing this?

Thank you,
Richard

I cannot answer right now… But I really recommend to use the seo_zenphoto plugin anyway as that better cleans URLs.

Btw, 1.6.5 has been released (not that this would change anything here though) ;-)

I think this is expected behaviour.

seo_zenphoto lets you know that you can't use it in conjunction with seo_null and shows you the warning as to why, they perform somewhat similar tasks and would clash with each other.

It also works the other way around - seo_null will show same warning, if seo_zenphoto is activated.

You can get the same warnings with other sets of plugins doing the same thing (for example, e-mail server)

Yes, kuzzzma is right and I didn't understand the report properly I guess. This is just an indicator why you cannot enable certain plugins.