[smokeping-users] Blocks instead of lines on the smokeping detail graphs

[Zoe O'Connell]

Hi,

I have a strange problem with smokeping graphs - the horizontal line in 
the detail graphs appears as a block, thus: 
http://thunderchief.hotchilli.net/smokeping-example.png

I'm guessing I have an out of date or otherwise bad version of some 
library somewhere - the problem started when we upgraded to 2.1.1 but I 
just upgraded to 2.3.5 and it's still doing it. Any ideas what coudl be 
wrong or where to poke to investigate further? (I've made sure we're 
running the latest libgd from Debian stable)

Thanks.