Issue with some devices with Cacti 0.8.8a

[mylon2202]

I have some issues with some devices not polling correctly I believe.
I'm on Cacti 0.8.8a I've upgraded through a bunch of versions.

One of these switches was working fine until I did an upgrade on the IOS. But I also upgraded another same model switch to the same IOS and I don't have the issues so I don't believe it's an IOS problem.

I've attached some screenshots of the issues.

I'm not good with debugging cacti.
I'm running it on a Windows 2003 system.
Net-SNMP 5.5.0
PHP 5.2.11
RRDTool 1.3.8-win32-ruby1.8-perl5.10

Anything you want me to give for outputs let me know what commands to run where and I can get it.

[BSOD2600]

http://docs.cacti.net/manual:088:4_help.2_debugging is a good starting point. Any other devices/graphs have data gaps? If its across multiple devices, probably a cacti issue. if it's just for one device, then more likely something with it (anti-DoS protection, etc).