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Systella dusmeti
Trygonopteridae, Trygonopterinae, probably Systella sp. and looks like it might be nymph of Systella dusmeti. I must agree, it is a little bit risky for a suggestion...Note the dark femurs and dark areas in yours and Systella dusmeti.
Maybe Chun can help us more, he knows Sabah wildlife quite well. All these dead-leaf katydid/grasshoppers might be very variable in color and markings. I add just a few examples to illustrate:
http://www.masterfile.com/stock-photogra...
http://rolfnussbaumer.photoshelter.com/i...
http://www.masterfile.com/stock-photogra...
http://www.whatsthatbug.com/2009/11/28/u...
http://orthoptera.speciesfile.org/Common...
http://www.wildborneo.com.my/photo.php?f...
http://www.wildlifethailand.com/forums/3...
http://www.animalsandearth.com/en/photo/...
http://orthoptera.speciesfile.org/Common...
http://www.visualphotos.com/image/1x9122...
http://jorisvanalphen.com/stories/borneo...