See: #2748479: Uncaught Syntax error, unrecognized expression: [value=main-menu:0] (broken menu select)
sylus created an issue. See original summary.
Merge pull request #1859 from sylus/7.x-4.x
Fixed WetKit Core for Issue...
Fixed WetKit Core for Issue #2748483: Hierarchical Select + Uncaught...
Automatically closed - issue fixed for 2 weeks with no activity.
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