I use a U.S. keyboard and hence the U.S. keyboard set in OS 10.7. However, I often have to use umlauts (¨) and accents when I write. Since forever I am using the keyboard method for producing these, e.g. umlaut = alt+u followed by letter on which I desire the umlaut. However, randomly and seemingly for no apparent reason I get the following: I press alt+u and instead of creating a highlighted "¨" in my text field, Safari opens a new window where the highlighted "¨" shows up, however, it won't let me type in any letter and I am left unable to insert umlauts and accents using the method I've been using for years. I know this sounds very convoluted so please see the pic where I point out the odd window that Safari opens. Does anyone know why this happens and how, if possible, this window that pops up can be disabled? Many thanks!