Comment 9 for bug 1086296

~suv wrote:
>JazzyNico wrote:
>> Apparently affects external scripts only, not the internal ones

> the current layer is initially not set after the document content
> is replaced with the output of the effect extension script

Which could also explain why internal extensions are not affected: AFAIU they don't have to completely replace the current document content with the output they generate, since they access the XML tree internally directly - hence the current layer level is not modified unless explicitly triggered by the extension?