Error starting Roo shell: "Unable to get truested keys" [sic]

[matthewadams]

Hey, I'm not sure what happened, but Roo shell was happily working until I started it this morning. Now, I get the attached exception, and the shell is pretty much unresponsive both inside & outside of STS.

The first part of the stack trace is:

[0m]0;Spring Roo 1.2.1.RELEASE [rev 6eae723][7m[0m[32mWelcome to Spring Roo. For assistance press TAB or type "hint" then hit ENTER.
[0m[s[1;102H[7mDownloaded 0% of favorites.json[0m[u[s[1;102H[K[1;102H[7mDownloaded 0% of favorites.json[0m[u[s[1;102H[K[1;100H[7mDownloaded 100% of favorites.json[0m[u[s[1;100H[K[1;100H[7mDownloaded 100% of favorites.json[0m[u
[7m[0m[32m[7m@Han_Cholo:[0m Be sure to checkout the webinar today on Whats new in Spring Roo 1.2 [32m[4mhttp://t.co/VJIokA08[0m [36m#Spring[0m 
[0m[33mroo> [0m[s[1;100H[K[1;100H[7mDownloaded 100% of favorites.json[0m[u[s[1;100H[K[1;100H[7mDownloaded 100% of favorites.json[0m[u
[7m[0m[31m[org.springframework.roo.felix [47]] [org.springframework.roo.felix.pgp.PgpServiceImpl] The activate method has thrown an exception
java.lang.IllegalArgumentException: Unable to get truested keys
    at org.springframework.roo.felix.pgp.PgpServiceImpl.getTrustedKeys(PgpServiceImpl.java:197)
    at org.springframework.roo.felix.pgp.PgpServiceImpl.trust(PgpServiceImpl.java:402)
    at org.springframework.roo.felix.pgp.PgpServiceImpl.trustDefaultKeys(PgpServiceImpl.java:443)
    at org.springframework.roo.felix.pgp.PgpServiceImpl.trustDefaultKeysIfRequired(PgpServiceImpl.java:455)
    at org.springframework.roo.felix.pgp.PgpServiceImpl.activate(PgpServiceImpl.java:90)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

See the attachment for the full dump from Roo.

I'm using Roo 1.2.1.RELEASE on Ubuntu 11.10 64-bit with 64-bit Sun Java 1.6.0_30.

Any ideas? Behavior's the same with a virgin Roo distro as it is with my usual one, both in my project and in a temp directory.

Thanks,
Matthew