Some bugs I've noticed in plot:

1. Misplaced subtitle in multiplot:

   pd 'multi 2 3;title Long string title;subtitle Long string subtitle'
   pd 6 2 $ 'type line' ; 11 22 33
   pd 'show'

2. Non-zero penstyle leads to graph distortion:

   'penstyle 0 0' plot 0 ,. 1j2 2j3  NB. ok
   'penstyle 0 1' plot 0 ,. 1j2 2j3  NB. bad

3. Plot fails with xlog=1 and some combination of xmin and xmax:

   load 'numeric'  NB. steps
   'xlog 1' plot (];(1 & o.)) steps 10.00 1000 20  NB. ok
   'xlog 1' plot (];(1 & o.)) steps  9.99 1000 20  NB. fails
|NaN error: getaxis1
|   Div=.zero(Int    -Min)%Max-Min

Problem is possibly in line 3037 of jzplot.ijs:
---
min=. nmm rounddown min
---
which assignes zero to min when getticpos verb is called with parameter log=2.

-- 
Best regards
Igor
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