BUG? Critical error. Field [screenid] is not integer

[clahti]

Using Zabbix 1.3.2, I am trying to setup a "screen" with three graphs for a server. I first have defined three graphs:

fooserver bond0 network activity:
net.if.in[bond0]
net.if.out[bond0]
net.if.collisions[bond0]

fooserver disk activity:
vfs.dev.read[sda]
vfs.dev.write[sda]

fooserver processor usage
system.cpu.load[,avg1]
system.cpu.load[,avg5]
system.cpu.load[,avg15]

All those graphs seem to work individually, now I go to create a screen with all three graphs. The initial screen loads with 1 hour history fine, but if I try to change the value to any other time period (like 2 hours or 8 hours) I get the following error:

Critical error. Field [screenid] is not integer

Any ideas? As a side note is the 1.1.5 version significantly more stable? I went with 1.3.2 with the anticipation that 1.4.x was going to be released in the next month according to other posts. I am a very new user and just figuring out how things work in Zabbix, if I "downgrade" to 1.1.5 what features would I be giving up?

[clahti]

Actually a bit more information, in addition to the Critical error. Field [screenid] is not integer error message the page also says [ERROR: Invalid URL] right above that if this helps in the diagnosis.