WTF? Error message that has 1st letter removed from each package name.

Got this error message when trying to run a test in IntelliJ IDEA 9.

NoClassDefFoundError: org/pache/ommons/bcp/asicDataSource

I don't really know what's going on, but somehow each of the package
groups has the 1st character missing. Bizarre.

I'll clean out the IDEA cache using "File --> Invalidate Caches" and
see if that fixes it.

Nope, didn't.

Further down the stacktrace it shows the right name:

Caused by: java.lang.ClassNotFoundException:
org.apache.commons.dbcp.BasicDataSource
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)