OS: Linux Debian testing (jessie)
GUI framework: wxGTK-2.8.12
C::B revision: 9128
GCC: 4.7.3 32-bit
I think I might have discover a bug with margins and caret settings in editor. I went to Settings > Editor > Margins and caret, and checked "Allow multiple selections..." and "Enable typing (and deleting)...".
I select the lines of my choice with Ctrl and mouse, I can see my cursor making a last cursor line along column. Then I press Ctrl-shift-arrows (left or right) to highlight the keyword I would like to replace and instead of highlight all keywords under cursor, it would select only the keyword from last cursor. If I press delete, it would delete selectively than collectively, that is as a whole. Also, as I type and auto complete pops up with an option, if I press the tab key, it won't add it in all cursors, but only to the last pointed cursor.
I will try to make a small video to show you what I mean.