This one cracked me up...
While giving a public talk a brother pronounced the old civilization of the Hittites as the "High Titties".
One brother in our hall would sometimes pronounce the word "misled" as [MY' - ZULD.]
"Do not be myzled. Bad associations spoil..."
It used to bug me when people would read "fleshy" as "fleshly." Remember the scripture in Revelation that used that word about eight times in a row? And they'd read it wrong every time. (Sorry. Weird pet peeve.)