Very long URLs seem to get ignored by Web Booster. This is because the default maximum URI length is 512 bytes. Very long URLs (such as those generated from Quickplace) exceed this limit (eg 650). To tell Booster to accept longer URLs, set the following property:
where 999 is the number of bytes you want to accept. This is a security feature in Booster to stop attempted buffer overflow exploits by malicious web clients.