I am on beta 5, and the last 3 times I have gotten new resources, I have entered Merge Index (via a button on my toolbar), and it does a first time reindex. Today I downloaded a 872KB resource, and my system reindexed fresh the night before last with nothing new since. I click on Merge Index, and it is now doing a full first time reindex!
Is this a bug? Very frustrating to get surprised by a full reindex in the middle of the day...