I launch gnome-panel and, while the 'flicking', I managed to delete the clock applet from the upper panel, when done, the panel stopped flicking and now it seems to work ok.
I thought it was the clock applet because I think I saw some error referring to the timezoning.
I put back clock applet on the panel, to keep aware of it. I don't know, it may be something related to language-support{,-es} or language-pack-gnome{-es,-es-base} packages, as long as I can recall, there where some updates on those packages and I think there's strong relation because the localization.
I launch gnome-panel and, while the 'flicking', I managed to delete the clock applet from the upper panel, when done, the panel stopped flicking and now it seems to work ok.
I thought it was the clock applet because I think I saw some error referring to the timezoning.
I put back clock applet on the panel, to keep aware of it. I don't know, it may be something related to language- support{ ,-es} or language- pack-gnome{ -es,-es- base} packages, as long as I can recall, there where some updates on those packages and I think there's strong relation because the localization.