Is this a problem inherently with Ares or with a project using it? My mod is also recently encountering this issue and it's definitely not an internal error from the coding.
Which Ares version are you using? Did you try to reproduce it with an earlier version, or without Ares? We can't say if it is an Ares problem or not, because you didn't provide us any info. :P
I was actually asking redfox34, since the version you posted the bug for can be easily checked in our old bugtracker. :P
Still, at least we know it wasn't fixed before moving to launchpad. ;)
Something's going wrong in the SHP drawing routines... I've seen this glitch before, but I don't have any useful ideas on what's causing it.