In Spain is quite common the usage of tildes (eg: "adiós", "camión", "cómo", "qué", "dónde", "quién", "cuándo", "cuánto", "computación"...). In order to get these letters, we need to press the tilde key and then the vocal. But every time I press the tilde I loose the focus of the omnibar, and we need to press it twice in order to make it work, which is quite annoying.