I am having the same sorts of problems with the header:
upon activation I get:
"The plugin generated 2 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin."
I get different activation errors depending on the theme
Twenty Ten 1.0.2:
"The plugin generated 2 characters....
WordPress Default 1.6
"The plugin generated 1 characters....
And on a when I logout I get:
"Warning: Cannot modify header information - headers already sent by (output started at /home/theo3/public_html/asiel/wp-content/plugins/islidex/islidex.php:1170) in /home/theo3/public_html/asiel/wp-login.php on line 337
So on and so forth...
I am using WordPress 3.0.
I have no other active plugins
