Since the last update with Workspaces option added, i've a bit annoying issue with this keyboard shortcut. Each time I move a tab to another workspace, it create an "invisible barrier" between the two surrounding tabs.
(You can replace X or Y with no matter Workspace value)
Tab 1 --- Tab 2 --- Tab 3 in Workspace X
If I move Tab 2 in Workspace Y, the Jumping tab shortcut will no longer work between Tab 1 and Tab 3 in Workspace X. And the issue will remain over the time, even with new tabs, like the concerned workspace is definitively corrupted.
And sometimes, this issue apperas even when I don't try to move tabs to another space. This is really annoying, as I need to manually click with the mouse on the previous / next tab, instead of use this shortcut.
When it happens, I've noticed that Opera tries to switch between tabs from Workspace Y (or whatever else), even when Workspace X is displayed on screen. I ve noticed this when it triggered by accident some YouTube videos in Workspace Y tabs.
This is a very specific issue, so I think I can't do anything else to just wait for a fix in the next version.