Gifllayer plugin problem

Not directly nsBasic related but I have the attached project testing the gifplayer plugin.

If I use in a container all works fine. (top image)
If I use a bootstrap image nothing happens ( middle image)
If I use a multimedia image the play text is too high and the play click produces

TypeError: undefined is not an object (evaluating 'replaceString.replace').
line 155 column 35

Any ideas why this is ?
The answer may help with other plugins or a general understanding of this magic world…Archive.zip (212.6 KB)

Cheers

Steve Warby