8.1.11 PREPARE problem?

This is with jdbc3-415. None of the (jdbc, or pg) change logs since then
have mentioned this problem. When run as a prepared statement the first
statement will execute and return results, while the next two seem to
execute, but return no results. When run by hand, not prepared , each
statement runs just fine. when using an older version of the jdbc driver
(7.3?), that does not call PREPARE, things work just fine. Looking at
the logs below, it sure looks like the statements are running, given the
different durations, which are correct for the differences between the
statements. help please.

Dec 18 10:59:15 devel postgres[6889]: [2-1] LOG: duration: 358.005 ms statement: EXECUTE <unnamed> [PREPARE: select aggregationvalue.value as
Dec 18 10:59:15 devel postgres[6889]: [2-2] aggregationvalue$value,aggregationvalue.aggregatetype as aggregationvalue$aggregatetype,aggregationvalue.count as
Dec 18 10:59:15 devel postgres[6889]: [2-3] aggregationvalue$count,aggregationvalue.stoptime as aggregationvalue$stoptime,aggregationvalue.starttime as
Dec 18 10:59:15 devel postgres[6889]: [2-4] aggregationvalue$starttime from aggregationvalue where date_trunc($1, aggregationvalue.stoptime) between $2 and $3 and
Dec 18 10:59:15 devel postgres[6889]: [2-5] aggregationvalue.aggregatetype = $4 and split_part(aggregationvalue.value,':',1) = $5 and
Dec 18 10:59:15 devel postgres[6889]: [2-6] split_part(aggregationvalue.value,':',2) like $6 and split_part(aggregationvalue.value,':',3) like $7 ]

Dec 18 10:59:25 devel postgres[6889]: [4-1] LOG: duration: 25.001 ms statement: EXECUTE <unnamed> [PREPARE: select aggregationvalue.value as
Dec 18 10:59:25 devel postgres[6889]: [4-2] aggregationvalue$value,aggregationvalue.aggregatetype as aggregationvalue$aggregatetype,aggregationvalue.count as
Dec 18 10:59:25 devel postgres[6889]: [4-3] aggregationvalue$count,aggregationvalue.stoptime as aggregationvalue$stoptime,aggregationvalue.starttime as
Dec 18 10:59:25 devel postgres[6889]: [4-4] aggregationvalue$starttime from aggregationvalue where date_trunc($1, aggregationvalue.stoptime) between $2 and $3 and
Dec 18 10:59:25 devel postgres[6889]: [4-5] aggregationvalue.aggregatetype = $4 and split_part(aggregationvalue.value,':',1) = $5 and
Dec 18 10:59:25 devel postgres[6889]: [4-6] split_part(aggregationvalue.value,':',2) like $6 and split_part(aggregationvalue.value,':',3) like $7 ]

Dec 18 10:59:25 devel postgres[6889]: [6-1] LOG: duration: 2.000 ms statement: EXECUTE <unnamed> [PREPARE: select aggregationvalue.value as
Dec 18 10:59:25 devel postgres[6889]: [6-2] aggregationvalue$value,aggregationvalue.aggregatetype as aggregationvalue$aggregatetype,aggregationvalue.count as
Dec 18 10:59:25 devel postgres[6889]: [6-3] aggregationvalue$count,aggregationvalue.stoptime as aggregationvalue$stoptime,aggregationvalue.starttime as
Dec 18 10:59:25 devel postgres[6889]: [6-4] aggregationvalue$starttime from aggregationvalue where date_trunc($1, aggregationvalue.stoptime) between $2 and $3 and
Dec 18 10:59:25 devel postgres[6889]: [6-5] aggregationvalue.aggregatetype = $4 and split_part(aggregationvalue.value,':',1) = $5 and
Dec 18 10:59:25 devel postgres[6889]: [6-6] split_part(aggregationvalue.value,':',2) like $6 and split_part(aggregationvalue.value,':',3) like $7 ]