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[yojoe]

@yojoe: Okay, blame my hosting provider (btw it's very popular in Italy), but why YOU (the author of this plugin) don't try to resolve this bug at least ?

Because that's not a bug. That's neither a feature.
That's a commonly used function by webdevelopers.
And as webdevs do not spend time on adjusting websites to operate with 10yrs old IE6 browser because that's a nonsense, I wont' loose time on finding out why a simple plugin which operates on at least 3 webhosting provieders (I've tested on polish, german, french) do not work on an old fashioned italian hosting provider.
Force your webhost provider to make your up to date application work.
You pay them for it !