Veroboard interstrip bleed?

[SonicVI]

I've recently built a failty simple fuzz circuit on stripboard and am getting a lot of high frequency noise that I didn't get on the breadboard.  The first stage is just an emitter follower buffer, it shouldn't be creating any distortion, but when I use an audio probe I get some sort of low level background distortion after the buffer stage and even at the input jack which is leading me to believe I'm getting some bleed from the fuzzy gain stages into the input, and subsequently creating a sorta feedback loop and the squealy noise. Otherwise the circuit is working, I've checked over my work many times.  I've built this circuit before many times but not on vero and not had this particular problem.  Does this sound like reasonable conclusion?   

[jayp5150]

I tend to get 'invisible' solder bridges at times on Vero. I take an x-acto knife and run the tip between all the traces to make sure. I can usually feel what my eyes won't catch.

Also, for my cut traces, I hold the board up to a light to make sure there's no trace of copper left as well.

That might be a place to start.

[Renegadrian]

second that!!!

[peps1]

I take an x-acto knife and run the tip between all the traces to make sure. I can usually feel what my eyes won't catch.

A really good strip board tip!

[davidallancole]

Its weird what can happen on circuit boards.  In school we build a 50W power amp for one of our projects.  We used turrets for connecting the power.  The +35V conection was next to the Ground connection and everytime I turned the amp on it would arc from the +35V to Ground.  For the life of me we could not figure out why.  There was no solder bridge between the two turrets, I even used an exacto knife to make sure.  In the end I just left it on until the arcing stopped and it never happened again.

Anyways, something that may be more helpful.  Can you post the layout of your board?  I believe there is capacitance between one strip to the next, though I am not sure how much capacitance there is.  That may couple some signal back to the input.

[SonicVI]

I've checked for continuity between strips, it's not that.     Is there anyway to get rid inter-strip capacitance?  I can't think of anything.