Yes, dividers are visually thin (at least most of them) but its' active areas are pretty wide (and these areas has 'resizing' cursor of course). So, it's by design.
IDEA-146892 - On Ubuntu 14.04, a click on the invisible horizontal splitter to begin resizing frequently selects (switches) a tab in the lower editor, and sometimes drags it.
IDEA-147284 - Resizing via the invisible vertical splitter, changes the insertion point and selects text in the right editor
To call this "by design" is absurd. NOBODY wants a simple act of resizing to have such side-effects. These need to be fixed. Are you arguing otherwise?
Why no response? Is it reasonable that an "upgrade" break such basic functionality as editor pane resizing?
Yes, dividers are visually thin (at least most of them) but its' active areas are pretty wide (and these areas has 'resizing' cursor of course). So, it's by design.
There were several recently fixed bugs with cursor, scrollbar and selection in editor. Fixes on the way!
Please look at these open bugs:
https://youtrack.jetbrains.com/issue/IDEA-146892
https://youtrack.jetbrains.com/issue/IDEA-147284
They describe two significant regressions:
To call this "by design" is absurd. NOBODY wants a simple act of resizing to have such side-effects. These need to be fixed. Are you arguing otherwise?
Fixed for 8.0.2