Created attachment 66456 [details] the settings of the task manager... Version: unspecified (using KDE 4.7.2) OS: Linux Occasionally a ghost tasks appears in the task manager and spoil the arrangement of the task buttons. When I log out and back on everything seems okay. This happens after a particular application is started but not sure which one... I have attached a file that depicts the problem and also the settings of the task manager. In the attachment it is seen that the "rows" (columns with a vertical taskbar) must be two and that is the behavior, until the ghost tasks appear and then the columns get 3 or sometimes 4 ... Reproducible: Sometimes Steps to Reproduce: well it happens after opening some application(s) Expected Results: To not have the ghost tasks...
Seems a duplicate of 202199
May have something to do with applications that pop out from the tray in the taskbar and back in the tray like skype or thunderbird with MinTrayR add-on... Also sometimes a new application appears stacked on another one which is already open as if the new one "thinks" the space of the opened one is empty, but I can live with the last, because when I do a manual rearrange of the tasks it fixes the stacked ones.
definitely the same issue *** This bug has been marked as a duplicate of bug 202199 ***