JVM 1.3.1_02 crashes intermittently with the following stack trace:

current thread: t@122
=>[1] 0xfb001d58(0xe849e0f8, 0xf8dfcef8, 0xf8445da0, 0xf8c951a0,
0xf8445da0, 0xf8445da0), at 0xfb001d57
  [2] 0xfb1d05b8(0xea83b6e0, 0xe849e0f8, 0xe849ea38, 0xea83b6b0,
0xe845fc90, 0x0), at 0xfb1d05b7
  [3] 0xfb1abe60(0xea83b6e0, 0xe849af08, 0xea9dda08, 0xdfd01820, 0x0,
0xf8d0cbbf), at 0xfb1abe5f
  [4] 0xfb1eaea4(0x5, 0x1, 0x4, 0xfe796000, 0xdfd019c0, 0xf8d13668), at
0xfb1eaea3
  [5] 0xfb002748(0x0, 0x1, 0xfe7a2900, 0x954a4, 0x1e, 0xe), at
0xfb002747
  [6] 0xfe7cb3f4(0xdfd019e0, 0xdfd01c18, 0xa, 0xf8d12e38, 0x8f4a0,
0xdfd01b64), at 0xfe7cb3f3
  [7] JavaCalls::call_helper(0xdfd01c10, 0xfe796000, 0xdfd01b5c,
0x296aa0, 0x8f4a0, 0xdfd01c18), at 0xfe58162c
  [8] JavaCalls::call_virtual(0xf8d12fd0, 0xdfd01b48, 0xdfd01b4c,
0xfe796000, 0xdfd01c10, 0xdfd01b5c), at 0xfe5902c4
  [9] JavaCalls::call_virtual(0xdfd01c10, 0xdfd01c0c, 0xdfd01c08,
0xdfd01bfc, 0xdfd01bf4, 0x296aa0), at 0xfe590154
  [10] thread_entry(0xf8417000, 0x296aa0, 0xfe796000, 0xdfd01d18, 0x1e,
0xe), at 0xfe5900dc
  [11] JavaThread::run(0xdfc82000, 0xfe79fe9c, 0xfe796000, 0x80000,
0x296aa0, 0x80000), at 0xfe58fee8
  [12] _start(0xfe796000, 0xfe7f3d18, 0x0, 0x5, 0x1, 0xfe401000), at
0xfe57fd0c

We are unable to reproduce the problem with java_g.