Martin - no, never heard that one. There were some concerns that there no equivalent of the jettisonable side panels, so initially (until a crash axe was fitted) there was a requirement to take off and land with the canopy partially open. This must have been fun in a Canadian winter! The other issue was severe buffeting generated by the canopy when spinning, which is why these aircraft (with the blown canopy) have reduced span stalling strips.
Webby - the u/c housing X-ray requirement is every 12 years (reduced if there are cracks detected; I'm on a 6 year cycle).