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Changes between Version 4 and Version 5 of Ticket #26842, comment 24

v4	v5
25	25	}}}
26	26	The above actually relates to the peculiar feature of Next Generation Gallery plug-in (buried deep in its code) that served to enabled the function that worked by coincidence. My main purpose here is just not to leave my mistake from months ago uncorrected, since I know that people like me looking for solutions often arrive at threads like this one looking for answers.
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	28	UPDATE:
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	30	One other thing: I mentioned the long story about Next Generation Gallery. It's very widely in use (1 million installations I believe). It turns out that, because of the peculiar way that it amends the TinyMCE editor, it converts, but does not eliminate, the problematic characters - \xc2\xa0, in UTF-8 - into the HTML ` `: So, I think NGG users will have to substitute the latter for the former. Or a more comprehensive fix would have to fix both. I'm going to stop here, though, before I discover some new complication...