I’ve just downloaded the workbench and am running under Mavericks on an imac. The breakpoint icon don’t seem to work as documented which was pretty confusing. When I eventually used the breakpoint viewer window they were being indeed set and cleared correctly as I mouse clicked in the left hand margin of the editor. However the icon just remains present even when reported as cleared - it doesn’t even change colour. Am I missing something obvious or this is a bug?
This was posted 3 months ago, so maybe it’s all water under the bridge.
I have just encountered something similar when upgrading to Mountain Lion.
The line numbers and the breakpoint icons fail to scroll along with the body of text.
I have found an (irritating) work-around. Just grab the bottom or top of the editor window and drag it a fraction of an inch.
This causes a refresh which puts everything right (until you do the next scroll).
My guess is that the change of scrolling direction convention in ML and Maveriks broke the line number code.