KVIrc mishandles URIs

OS: Trisquel 7.
Package: KVIrc 4.2.0.
Expected behaviour: I click on , KVIrc goes to #nottor on OFTC.
Reason: RFC 3986.
Problem: I click on , KVIrc goes to #%23nottor on OFTC.
Solution: Upgrade to latest KVIrc.