Most of Swing test case on I18N suits crashed on Win98 by JDK1.2.2 build "N".
(It is confirmed also on build "M" and JDK1.2.1 build "L".)
Dialog comes up and said that "Java stack error occurs";
the detail is below.

module:KERNEL32.DLL address:015f:bff7431f
Registers:
EAX=817112b4 CS=015f EIP=bff7431f EFLGS=00000283
EBX=05a5ff10 SS=0167 ESP=05a6203c EBP=00008034
ECX=cdab8fa0 DS=0167 ESI=00428b7c FS=4eef
EDX=000294c4 ES=0167 EDI=0000ffff GS=0000
Bytes at CS:EIP:
eb 95 8b 54 24 04 50 e8 04 00 00 00 58 c2 04 00
Stack dump:
bff71547 00000282 72cd1511 00000000 05a62074 72cd1537 00000cb4 ffffffeb
00000000 00000006 00000282 72cd1511 00000000 00000000 05a6209c 72cd1566

Crash was confirmed on at least following case, SwingUtilitiesTest,
DebugGraphicsTest, JTreeTes.
But, for example, java sometimes crashes on DebugGraphicsTest, sometimes does not.

Win95/NT passed swing tests.