Help please - misfire diagnosis

[Libs]

About 30 miles from home developed a slight misfire. Seems to run cleanly at constant rpm but stutters slightly under acceleration. Haven't had the clam open yet to investigate but any pointers? Could it be a cracked manifold? Jet stream replaced a cracked one last year with the stainless upgrade and I was planning to have the other replaced this year as the turbos will need an overhaul anyway.

All ideas welcome please.

[Libs]

Turned out to be a dodgy ECU, found by Jetstream. After cooling down ran cleanly most of the time but misfired after hitting full boost when hot. At least I think that's what Dave told me. ECU replaced, now fine.