Just witnessed an exception thrown by the service in production:
[2016-01-22T18:12:07.293Z] ERROR: mobileapps/199 on scb1001: 500: internal_error (message="500: internal_error", status=500, type=internal_error, detail="Cannot set property 'text-decoration' of undefined", levelPath=error/500, request_id=9fb9654c-c133-11e5-996e-7cc00f987d3f) stack: TypeError: Cannot set property 'text-decoration' of undefined at Parser.<anonymous> (/srv/deployment/mobileapps/deploy/node_modules/domino/lib/CSSStyleDeclaration.js:20:56) at Parser.EventTarget.fire (/srv/deployment/mobileapps/deploy/node_modules/domino/lib/cssparser.js:91:30) at Parser.additions._declaration (/srv/deployment/mobileapps/deploy/node_modules/domino/lib/cssparser.js:2615:26) at Parser.additions._readDeclarations (/srv/deployment/mobileapps/deploy/node_modules/domino/lib/cssparser.js:3123:41) at Parser.additions.parseStyleAttribute (/srv/deployment/mobileapps/deploy/node_modules/domino/lib/cssparser.js:3344:22) at parseStyles (/srv/deployment/mobileapps/deploy/node_modules/domino/lib/CSSStyleDeclaration.js:23:10) at Object.create._parsed.get (/srv/deployment/mobileapps/deploy/node_modules/domino/lib/CSSStyleDeclaration.js:36:28) at Object.create.getPropertyValue.value (/srv/deployment/mobileapps/deploy/node_modules/domino/lib/CSSStyleDeclaration.js:87:16) at Object.defineProperty.get (/srv/deployment/mobileapps/deploy/node_modules/domino/lib/CSSStyleDeclaration.js:258:19) at Object.hideIPA (/srv/deployment/mobileapps/deploy/src/lib/transformations/hideIPA.js:25:29) at runAllSectionsTransforms (/srv/deployment/mobileapps/deploy/src/lib/transforms.js:240:13) at Object.runParsoidDomTransforms (/srv/deployment/mobileapps/deploy/src/lib/transforms.js:261:5) at Request.<anonymous> (/srv/deployment/mobileapps/deploy/src/lib/parsoid-access.js:178:24) at Request.tryCatcher (/srv/deployment/mobileapps/deploy/node_modules/bluebird/js/release/util.js:11:23) at Promise._settlePromiseFromHandler (/srv/deployment/mobileapps/deploy/node_modules/bluebird/js/release/promise.js:489:31) at Promise._settlePromise (/srv/deployment/mobileapps/deploy/node_modules/bluebird/js/release/promise.js:546:18)
Looks like a problem in the domino library, but please investigate this.