larger than normal grain and other film problems

[Msfoto@xxxxxxx]

I have processed MANY rolls of infrared, but recently I noticed some new 
problems.
a couple rolls I processed in an Enterprise machine(similar to a jobo) were 
grainier than normal and even had more density along the sides of the 
strips..both sides. It almost looked reticulated. I process with Rodinal 1:50 
and never had problems like this beofrem ..
sometimes I have gotten darker strips running vertically on negs, and I 
thought maybe it was some sort of flair...where the edges seems to be getting 
more light than the center...
too many mysteries... I do get normal negs, so I am doing something 
right--sometimes! any ideas ?? thanks L.R
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