Compilation issue

Hi,

As per the attached image I'm getting an odd exception now when compiling.  Has only just started and I'm not sure what the reason is.  The idea.log file shows the following:

2009-04-03 11:26:07,766 [1803594]  ERROR - ij.compiler.impl.CompileDriver - null
java.lang.IndexOutOfBoundsException
at com.intellij.util.io.PagedFileStorage$1.createValue(PagedFileStorage.java:40)
at com.intellij.util.io.PagedFileStorage$1.createValue(PagedFileStorage.java:35)
at com.intellij.util.containers.SLRUCache.get(SLRUCache.java:23)
at com.intellij.util.io.PagedFileStorage.getBuffer(PagedFileStorage.java:206)
at com.intellij.util.io.PagedFileStorage.get(PagedFileStorage.java:120)
at com.intellij.util.io.PersistentHashMapValueStorage$MappedReader.get(PersistentHashMapValueStorage.java:137)
at com.intellij.util.io.PersistentHashMapValueStorage.readBytes(PersistentHashMapValueStorage.java:52)
at com.intellij.util.io.PersistentHashMap$5.process(PersistentHashMap.java:265)
at com.intellij.util.io.PersistentEnumerator.traverseRecords(PersistentEnumerator.java:230)
at com.intellij.util.io.PersistentEnumerator.traverseRecords(PersistentEnumerator.java:234)
at com.intellij.util.io.PersistentEnumerator.traverseAllRecords(PersistentEnumerator.java:222)
at com.intellij.util.io.PersistentHashMap.compact(PersistentHashMap.java:260)
at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:99)
at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:88)
at com.intellij.compiler.impl.StateCache.a(StateCache.java:12)
at com.intellij.compiler.impl.StateCache.<init>(StateCache.java:24)
at com.intellij.compiler.impl.FileProcessingCompilerStateCache$1.<init>(FileProcessingCompilerStateCache.java:5)
at com.intellij.compiler.impl.FileProcessingCompilerStateCache.<init>(FileProcessingCompilerStateCache.java:19)
at com.intellij.compiler.impl.CompilerCacheManager.getFileProcessingCompilerCache(CompilerCacheManager.java:26)
at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:29)
at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:373)
at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:284)
at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:228)
at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:804)
at com.intellij.compiler.impl.CompileDriver.access$400(CompileDriver.java:572)
at com.intellij.compiler.impl.CompileDriver$4.run(CompileDriver.java:6)
at com.intellij.compiler.progress.CompilerTask.run(CompilerTask.java:160)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$TaskRunnable.run(ProgressManagerImpl.java:3)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:5)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:13)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcess(ProgressManagerImpl.java:101)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$6.run(ProgressManagerImpl.java:16)
at com.intellij.openapi.application.impl.ApplicationImpl$5.run(ApplicationImpl.java:8)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
at com.intellij.openapi.application.impl.ApplicationImpl$1$1.run(ApplicationImpl.java:5)
2009-04-03 11:26:07,922 [1803750]  ERROR - ij.compiler.impl.CompileDriver - IntelliJ IDEA 8.1  Build #9732
2009-04-03 11:26:07,922 [1803750]  ERROR - ij.compiler.impl.CompileDriver - JDK: 1.6.0_10
2009-04-03 11:26:07,922 [1803750]  ERROR - ij.compiler.impl.CompileDriver - VM: Java HotSpot(TM) Client VM
2009-04-03 11:26:07,922 [1803750]  ERROR - ij.compiler.impl.CompileDriver - Vendor: Sun Microsystems Inc.
2009-04-03 11:26:07,922 [1803750]  ERROR - ij.compiler.impl.CompileDriver - OS: Windows XP
2009-04-03 11:26:07,922 [1803750]  ERROR - ij.compiler.impl.CompileDriver - Last Action: MakeModule

Any suggestions would be much appreciated?

-Toby