Ubuntu users may notice that their window decorations/controls spontaneously disappear, sometimes when launching apps in Crossover. This is a known series of bugs in Compiz. Apps running in Crossover do seem to trigger this bug more often than many native Linux apps, but there isn't anything we can change in our code to correct it.
We're rebels. We're misfits. But mostly, we're software liberators. And we're very, very good at what we do. We have to be. Lots of developers work with open source, but only a tiny fraction of those are good enough to get software that was designed for one platform to work on another one. We invented CrossOver software - a unique approach to cross-platform compatibility that does not require dual-boot or another OS license. We launched PortJump to help app and game developers broaden their market beyond Windows® users. And we launched ExecMode to help organizations solve really ugly technical challenges.