I might file this under Product Ideas, depending on the replies this gets: I'd like to test in a template if a plugin is enabled. I am not aware of a way to do this. The reason I'd like to do this is to prevent error messages that appear after disabling a plugin that has its own Movable type tags.
I'm using the Apture plugin. At times it fails to load and slows down the system considerably. After disabling it, MT returns the following error message, when publishing Entries or templates: "Publish error in template ...Unknown tag found: AptureScript".
After a while, I'm going to enable this plugin again, and therefore I'm certainly not going to remove the AptureScript tag from all templates, just because of a tiny error.
How would you handle this - to avoid error messages?
Reported on Movable Type 4.2
By the way, this tweet explains, I guess, why the plugin failed to load, causing the Edit Entry screen to load very slowly or only partially.