Created attachment 73564 [details]
ThreadDump (via StackTrace)

Actually, it looks that it might not freeze completely just got very busy. I selected "Close" from Windows menu and
after about 10 min it displayed the Save modified files dialog (still very irresponsive, the main window did not
redraw), and after 2 min or so it probably accepted my save all and closed.

is it reproducible? was invocation size default? and what text was entered?

> is it reproducible? 
No. I restarted, did the same thing again and it worked.

> was invocation size default? 

I think so. 

and what text was entered?
"tag back translation" (If I remember it correctly, I pressed Ctrl+Enter after "tag", right before the freeze)

I will attach the image of the resulting diagram (finished after restart), the freeze happened when editing "tag back
translation" 

Created attachment 73750 [details]
Created an attachment (id=73749) THe freeze happened during editing "tag back translation"

got out of memory/heap space trying to reproduce the issue with invocation resizing.
most likely initial issue is the same even I got exception faster then in 10 minutes.

it was something in wrap logic, can't reproduce any more with the fix. wrap logic is two level now and more simple in my
opinion.
61a69d9e3480

Integrated into 'main-golden', will be available in build *200811251401* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
Changeset: http://hg.netbeans.org/main/rev/61a69d9e3480
User: sergeyp@netbeans.org
Log: fix #152833 - reqrite newline splitting, so '\n' splitting have more simple logic now separated from word wrapping, also some words do not disappear now on dofferent sizes of widget. can't reproduce freeze with this fix.

verified in trunk build 20081203

re-verified in latest trunk build 20081217.

I've backported the changeset http://hg.netbeans.org/main/rev/61a69d9e3480 into release65_fixes repository as
http://hg.netbeans.org/release65_fixes/rev/7beda9079361

re-verified with 65patch2