Hi Raban.
Looks like it was the newest version of the NextGen Gallery 2.0.
This is documented at the NextGen site at:
http://wordpress.org/support/topic/known-plugin-conflicts-with-nextgen-20
Sorry Rabin, not sure why the link did not appear in the original post.
Here it is: http://www.greenoughharbourcommunity.ca
Note: tried to use the link button and the html code appears as
“”
but the link did not appear for some reason.