Qt rendering issues on Ubuntu 15.10

On Ubuntu 15.10 qt applications seem to not work properly, they have rendering issues after the system has been running for a while. Ubuntu is almost vanilla 15.10 with no special configuration.

I am unsure if these issues are bugs in Qt or are bugs in Ubuntu, but I'd really appreciate if someone pointed me to the right direction as to what to do.

I have created a bug report on launchpad describing the issue as best as I could: https://bugs.launchpad.net/bugs/1510899 - screenshots are attached. On the bug report you can also find links to various askubuntu.com questions (with more screenshots) from other users describing the same.

I am happy to help out and provide more data if needed.

Please forgive me if any of the fields on this ticket are set incorrectly.