Certain letters (but not always the same) are (temporarily) corrupted (see below, in Mozilla Firefox 35.0.1--not sure whether in other programmes), but usually 'fixed' with selecting the letter, or minimising & restoring window.
Any ideas?
My system: • Lenovo B50-35 • Processor: AMD A10-7800 Processor( 3.50GHz 2133MHz 4MB) • Operating system: Ubuntu 14.10 • Display type: 23.8" All In One with Multi-touch function 1920x1080 • System Graphics: AMD Radeon R7 A260 2GB