[chef] decrypted data bag missing data, ruby 1.8.7 vs rvm 1.9.3

hi. anyone know what's going on here? i was updating an encrypted data bag
item today. when i decrypted it in order to edit the json, i found entries
missing in the decrypted form when using rvm 1.9.3.

the entries missing were all "_cert" entries in the decrypted form. in the
decrypted form all the "_key" entries were intact. when displaying the data
bag item in encrypted form, all entires were intact. see below.

anyone know what's going on?

thanks,
kallen


[zahadum chef-repo]$ rvm use 1.9.3
Using /home/kallen/.rvm/gems/ruby-1.9.3-p194
Running /home/kallen/.rvm/hooks/after_use
[zahadum chef-repo]$ knife data bag show secrets webproxy-vacaynow-x509 
--secret-file ~/.chef/encrypted_data_bag_secret -Fj > decrypted.omfg.json

decrypted.omfg.json looks like this, entries missing:

{
  "wildcard_mysite_key": "-----BEGIN RSA PRIVATE 
KEY-----\nMIIEpAIBAAKCA\nxxxxSNIP_GOOD_DATA\n",
  "wildcard_mysite_cert": "",
  "wildcard_anothersite-admin_key": "-----BEGIN PRIVATE 
KEY-----\nMIIEvQIB\nxxxSNIP_GOOD_DATA\n",
  "wildcard_anothersite_cert": "",
  "id": "webproxy-vacaynow-x509"
}

if i don't decrypt, the "_cert" entries are intact:

[zahadum chef-repo]$ knife data bag show secrets webproxy-vacaynow-x509 -Fj | 
grep _cert
  "wildcard_mysite_cert": "Vcd646sJ/Cy8xxxx we're cool",
  "wildcard_anothersite_cert": "Bg8xjDjVLh2oIOz8h we're cool",



if i use the system ruby, 1.8.7, this problem does not occur.

[zahadum chef-repo]$ which ruby
/usr/bin/ruby
[zahadum chef-repo]$ ruby -v
ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-linux]
[zahadum chef-repo]$ knife data bag show secrets webproxy-vacaynow-x509 
--secret-file ~/.chef/encrypted_data_bag_secret -Fj > decrypted.good.json

{
  "wildcard_mysite_key": "-----BEGIN RSA PRIVATE 
KEY-----\nMIIEpAIBAAKCA\nxxxxSNIP_GOOD_DATA\n",
  "wildcard_mysite_cert": "MIIFhTCCBG2gAw\nxxxxSNIP_GOOD_DATA\n",
  "wildcard_anothersite-admin_key": "-----BEGIN PRIVATE 
KEY-----\nMIIEvQIB\nxxxSNIP_GOOD_DATA\n",
  "wildcard_mysite_cert": "MIIFYTCCBEmgAw\nxxxxSNIP_GOOD_DATA\n",
  "id": "webproxy-vacaynow-x509"
}


[zahadum chef-repo]$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 11.04
Release:        11.04
Codename:       natty