I updated the behaviour of my Kobo on my last post because, now (after some days or after I added a book, not from Kobo, on a mini SD card by copy/paste ?) I got the blured text bug
Edit : I don't know what to think : now, the blured text bug won't happen again. I had this bug one time this late afternoon and little time afterward, the Kobo went congealed, the only thing I could do was turning it off and then on again. From that moment on, everything is ok, though when I select a word to search the dictionnary, words seem crisper on the contrary... Stranger and stranger..