[PD] freeverb~ problem

All,

I've encountered a new issue with freeverb~. I am having a hard time isolating the source as it happens so sporadically (although it is always linked with the sudden drop in input and possibly a low frequency impulse) but it does not seem like it is a denormal problem because when it happens, I get a small burst of noise followed by nothing even though CPU is not getting pegged. The rest of the patch works fine but the freeverb is for all intents and purposes dead. It does not do anything until it is deleted and recreated. Any ideas what may be the cause of this? In the said example I only use one input (left). Could that have to do something with it? The object is compiled on 64-bit Linux with -O2 optimizations (IIRC).

Best,