The difference between が and を with the potential form of a verb.
I know the difference between 見る, 見られる, and 見える. I know that 見える and 見られる are verbs expressing a potential, which means they are intransitive, and thus implies they cannot have direct objects marked using を.
How come I sometimes see を used with 見られる? (Examples on Space ALC)
For example, why is
What are the rules for using を instead of が?