The following test fails on Linux and Windows while executing against HotSpot Server VM in -Xcomp mode.
------------ test.java -----------
import java.math.*;

public class test {
 public static void main( String[] args ) {
        BigDecimal n = new BigDecimal("1"+Long.MAX_VALUE);
        System.out.println(n);
        BigInteger m = new BigInteger("1"+Long.MAX_VALUE);
        System.out.println(m);
        if (n.toString().equals("1"+Long.MAX_VALUE))
            System.out.println("First test passed");
        else
            System.out.println("First test failed");
        if (m.toString().equals("1"+Long.MAX_VALUE))
            System.out.println("Second test passed");
        else
            System.out.println("Second test failed");

    }
}
----------------------------------

Below is output from the test execution:
-----------------------------------------------------
%java -server -Xcomp test
19223372036854775807
19223372037123211263
First test failed
Second test failed
%java -server test
19223372036854775807
19223372036854775807
First test passed
Second test passed
%java -client -Xcomp test
19223372036854775807
19223372036854775807
First test passed
Second test passed
%java -client test
19223372036854775807
19223372036854775807
First test passed
Second test passed
%
-----------------------------------------------------

The JDK version is:
java version "1.3.1beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1beta-b08)
Java HotSpot(TM) Server VM (build 1.3.1beta-b08, compiled mode)

The test passes in -Xmixed and in -Xint modes against JDK 1.3.1 Server VM; as well as the test passes in all execution modes against the Client VM.
The test passes against JDK 1.3.1-b07 both Client and Server VMs in all execution modes.

The following JCK1.3 api tests fail due to this bug against JDK1.3.1beta-b08 HS Server VM in -Xcomp mode:
api/java_math/BigDecimal/index.html#ValueOf
api/java_math/BigDecimal/index.html#ToString
api/java_math/BigDecimal/index.html#Ctor
api/java_math/BigInteger/index.html#Unary
api/java_math/BigInteger/index.html#Ctor