Following shows up with jVi, I found them using vim's g$,gj,gk commands which are like $,j,k but operate on screen lines, not text lines.

(((While investigating I found possibly related case that fails with the regular NB keybinding; see after my initial description. )))

Given following in editor (java)
line1

line3
or as a string doc.getText(0,20)
        "line1\n\nline3\n...."
If the curor is positioned at the end of the first line, on the 1 (offset == 4),then
        Utilities.getPositionBelow(ep, 4, 0x7fffffff); // MAXINT
returns 4, should return 6. (if 100 is passed instead of MAXINT, it works)
Using MAXINT works ok with regular JEditorPane.

I've worked around this in the jVi code (but, of course, I may not have found all the cases/situations where this is an issue).

=== NetBeans bindings problems ===
They have to do with wrapped lines:
Given these four lines, lines 1, 3 and 4 wrap

line1 One, one, Two, two, Three, (WRAP)
three. 

line3 One, one, Two, two, Three, (WRAP)
three. One
line4 One, one, Two, two, Three, (WRAP)
three. One

BUG: put the cursor on line4, press <End>, press <Up>.
NOTHING HAPPENS



(main-silver)
Product Version: NetBeans IDE Dev (Build 20110416-36d9fb69458c)
Java: 1.6.0_23; Java HotSpot(TM) Client VM 19.0-b09
System: Windows XP version 5.1 running on x86; Cp1252; en_US (nb)
Userdir: C:\a\src\jvi-dev\nbvi\nbvi-suite\build\testuserdir