since I've updated to 4.3.0, beside the constant plasma crushes I get double taskbar entries for one program, I've reseted the desktop settings but for no avail. Reproducible: Always
Created attachment 202228 [details] one image is better than 1000 words notice that there is one instance of firefox running, it happens for at most one program, resetting fixes the issue
*** This bug has been marked as a duplicate of bug 269270 ***
Tomáš, are you sure that this is a duplicate of #269270? I think that they are describing different bugs. I get this bug quite often, it's rather annoying. Even after the last window is closed, it hangs around in the taskbar, as I will demonstrate in a screenshot. Cheers.
Created attachment 219163 [details] OpenOffice.org still in taskbar
Oh, and the quickest fix that I have determined so far is to manually terminate and restart the plasma-workspace process.