While none of the vulnerabilities mentioned on SearchSecurity.com (and elsewhere) should cause anyone to panic, you might want to at least be aware of them until you upgrade to 6.0.4 or 6.5.2.

One is a problem that has the potential for some nasty cross-site scripting and was discovered within IBM/Lotus (Technote. The Notes URI handler problem (IBM Technote) is really something else ;-) These security folks sure come up with strange suff from time to time.