When using the module, I noticed no feed items were being displayed. I was able to trace the cause to the query in udplanet_content.inc (function udplanet_get_items). When I edited the query to include my drupal table prefix (uc) it worked correctly.
ideally, the module should be able to prepend the correct table prefix. If this is not the case the module fails to function. For refrence, below is my changed query (it also has the checks for disable and frozen removed, because i thought they might be causing the problem, terns out they we'nt)
SELECT
uc_users.uid AS uid,
uc_aggregator_feed.title AS title,
uc_aggregator_feed.url AS url,
uc_aggregator_item.title AS heading,
uc_aggregator_item.link AS link,
uc_aggregator_item.description AS content,
uc_aggregator_item.timestamp AS time
FROM uc_udplanet_feeds
LEFT JOIN uc_users ON uc_udplanet_feeds.uid = uc_users.uid
LEFT JOIN uc_aggregator_feed ON uc_udplanet_feeds.fid = uc_aggregator_feed.fid
LEFT JOIN uc_aggregator_item ON uc_aggregator_feed.fid = uc_aggregator_item.fid
AND uc_aggregator_item.timestamp IS NOT NULL
ORDER BY time DESC;
Also, there is not a column called time, uc_aggregator_item contains a column called timestamp, it's probably best to use that.