SSPWM interferes with debug out lcd data

[retepsnikrep]

I love the sspwm program but after several fruitless hours trying to get something on my bog standard 16x2 serial lcd using debug which worked on all my previous programs I plugged in my logic analyser. The data on the debug output pin is being corrupted. I assume by the timer interrupts generated by SSPWM. The sspwm output is on a different pin. I could try suspending the sspwm output while I update my lcd, in fact I'll try that just to confirm that is the cause.

Any ideas to resolve the conflict?

EDIT

Suspending SSPWM results in normal lcd operation via debug.