I use the vaadin version 7.7.9 but as indicated in the forum:

https://vaadin.com/forum/thread/16814459/vaadin-combobox-menu-opens-wrong-place-on-google-chrome-www-browser

It has a bug, on combobox, I've decided to upgrade the version to 7.7.12 that has resolved the issue, but there is another bug; So I have decided to pass to version 7.7.24, unfortunately there is a bug like the one in version 7.7.9; So I'm asking is that possible? In 7.7.9 have a bug resolved in 7.7.12 and introduced again in 7.7.23? Or there is some thing wrong, I do?