Here is the cert I was given by Geotrust support. This worked for me (when none of the ones on their downloads page did).
-----BEGIN CERTIFICATE-----
MIICkDCCAfmgAwIBAgIBATANBgkqhkiG9w0BAQQFADBaMQswCQ YDVQQGEwJVUzEc
MBoGA1UEChMTRXF1aWZheCBTZWN1cmUgSW5jLjEtMCsGA1UEAx MkRXF1aWZheCBT
ZWN1cmUgR2xvYmFsIGVCdXNpbmVzcyBDQS0xMB4XDTk5MDYyMT A0MDAwMFoXDTIw
MDYyMTA0MDAwMFowWjELMAkGA1UEBhMCVVMxHDAaBgNVBAoTE0 VxdWlmYXggU2Vj
dXJlIEluYy4xLTArBgNVBAMTJEVxdWlmYXggU2VjdXJlIEdsb2 JhbCBlQnVzaW5l
c3MgQ0EtMTCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAuu cXkAJlsTRVPEnC
UdXfp9E3j9HngXNBUmCbnaEXJnitx7HoJpQytd4zjTov2/KaelpzmKNc6fuKcxtc
58O/gGzNqfTWK8D3+ZmqY6KxRwIP1ORROhI8bIpaVIRw28HFkM9yRc uoWcDNM50/
o5brhTMhHD4ePmBudpxnhcXIw2ECAwEAAaNmMGQwEQYJYIZIAY b4QgEBBAQDAgAH
MA8GA1UdEwEB/wQFMAMBAf8wHwYDVR0jBBgwFoAUvqigdHJQa0S3ySPY+6j/s1dr
aGwwHQYDVR0OBBYEFL6ooHRyUGtEt8kj2Puo/7NXa2hsMA0GCSqGSIb3DQEBBAUA
A4GBADDiAVGqx+pf2rnQZQ8w1j7aDRRJbpGTJxQx78T3LUX47M e/okENI7SS+RkA
Z70Br83gcfxaz2TE4JaY0KNA4gGK7ycH8WUBikQtBmV1UsCGEC AhX2xrD2yuCRyv
8qIYNMR1pHMc8Y3c7635s3a0kr/clRAevsvIO1qEYBlWlKlV
-----END CERTIFICATE-----  |