uh oh, just got an error trying to test in IE10 that may be related:
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Message from webpage
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Javascript error!
Object doesn't support property or method 'trimRight'
localhost/Spritefont2_plugin.js, line 490 (col undefined)
This is either a bug in Construct 2 or a problem in a third party plugin or behavior - please report it to the developer!
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OK
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My test capx above didn't give this error, so I will have to poke around some more, see what else could be causing it.