Might be something as simple as dust. Sometimes, typically with dual laser mice, if dust settles or catches under the lens, it'll prevent it from moving along a single axis. That or it really is dead...
PSU: Corsair 1000HX - Case: Thermaltake Xaser VI Full Tower - CPU: Intel Core i7 2600 @3.8GHz - Cooler: Thermaltake FRIO - Motherboard: ASUS P67 Sabertooth - Memory: 16GB Corsair Vengeance LP Arctic 1600 - GPU: 2x AMD Radeon HD 5870 - HDD: WD Caviar Black 1TB 6Gb/s - Audio: ASUS Xonar DX + Corsair HS1 USB Headset
K/B: Corsair K90 - Mouse: Corsair M60 - Monitor: DELL U2410 - Speakers: Corsair SP2500 - Headset: Corsair HS1A - Mic: Blue Yeti USB Microphone
- I need Fiber to fix my Irregular Bandwidth Syndrome -