Error "BMWMB0081E:Space is not created correctly" seen with Lotus Mashups 2.0

Did you ever see this error when attempting to create a new space: -

BMWMB0081E:Space is not created correctly.

I followed the advice in this Technote: -

BMWMB0081E: Space is not created correctly

but to no avail.

I also see: -

[9/17/10 16:32:51:423 BST] 0000002f EasyX509Trust W com.ibm.mm.proxy.util.contrib.EasyX509TrustManager checkServerTrusted Since the unsigned_ssl_certificate_support flag is enabled, the following exception is IGNORED: PKIX path building failed: java.security.cert.CertPathBuilderException: PKIXCertPathBuilderImpl could not build a valid CertPath.; internal cause is:
java.security.cert.CertPathValidatorException: The certificate issued by CN=wps615.uk.ibm.com, OU=Root Certificate, OU=wps615Node01Cell, OU=wps615Node01, O=IBM, C=US is not trusted; internal cause is:
java.security.cert.CertPathValidatorException: Certificate chaining error

in /opt/ibm/MashupCenter/2.0/mm_profile/logs/server1/SystemOut.log at the same time, but this looks to be a warning rather than an exception, and I have: -

<proxy:meta-data>
<proxy:name>unsigned_ssl_certificate_support</proxy:name>
<proxy:value>true</proxy:value>
</proxy:meta-data>

set in: -

/opt/ibm/MashupCenter/2.0/mm/config/proxy-config.xml

Seen anything similar ?