Hi Yehonatan, sorry you're having troubles. This is not something we're hearing complaints about so far. But you're seeing it on more than one computer? If you remove all plugins does it go away? Do you have any plugins that modify your toolbars or attempt to manage them?
I would recommend removing plugins and go through the process again of adding them back. It sounds like there might be one that somehow is messing things up, but it might take a little while before it is noticeable. That is my first guess.
You could also send me a zip files of your plugins folder and I'll see if I can recreate the issue. Let me know if that sounds like a good option, I'll give you an email that you can email it to.
Thanks,
Chris