In CAS view enter the following:

plotfunc(SIN(x))

The result is a tiny plot. Now selecting the tiny plot and copying it to the stack results in the following:

plotparm(x+(i)*sin(x),x=5...5.0125)

Notice the extra dot in the x range. It is necessary to remove the extra dot for the plotparm() function to work.

I uploaded a screencast of the bug here:

http://youtu.be/ymjKwIXUvFE

[EDIT]

Perhaps the 3 dots are fine (the first is a decimal) and only a space is needed:

plotparm(x+(i)*sin(x),x=5. ..5.0125)

[EDIT 2]

Another bug in plotfunc() and/or plotparm():

http://youtu.be/IMm8AgLxVJI

*Edited: 4 Dec 2013, 12:12 a.m. *