When I activate the Javascript Aggregate option I receive the below errors in Firefox. When I turn the option off the errors dissappear. Should I continue to use the aggregate option in spite of these errors?

SyntaxError: illegal character

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js_xeI...3FJ4.js (line 1)

SyntaxError: illegal character

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js_g0r...WL58.js (line 1)

SyntaxError: illegal character

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js_uZ5...TgvM.js (line 1)

SyntaxError: illegal character

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js_43n...A554.js (line 1)

ReferenceError: jQuery is not defined

...\u002Fthemes\u002Fomega\u002Fomega\u002Fcss\u002Fformalize.css":1, "sites\u002Fa...
modules (line 28