Rather than trying to keep track of the posts that need to be bookmarked in my browser, I'm going to use this journal to bookmark interesting forum pages.

how scrobbles are stored
scrobbler counter off
listing covers
Hidden features - friends loved - explore library (by date)
multiple listener scrobbles / manual / Universal
note on redirection & plays
tag filtered radio (client)
news for artists
redirection numbers … Not correcting tracks to artist
database breakdown
top fans
group leadership requests
Minutes listened (Russ' comment) & Related
Arcade Fire incident (Unmoderation duration) (Korn 2009)
Banning artists (beyond tracks)
Banned tracks…

The sort by time user script for Opera which sorts artists by the time you've spent listening to them on Last.fm, has just been updated to support track plays for the 3, 6, and 12 month charts and for overall plays.

The script
Support thread

The times for the tracks come from your Last.fm library.

The taste-o-meter for neighbours, friends, etc. has been updated for the new format. It is available here.

Note that the taste-o-meter is a little wonlky at the moment. I am only about 20% compatible with myself - your mileage may vary - so don't expect more than a low match for people until that gets straightened out.

The "average play" script has been updated to fix the new format on the track and artist pages.

http://userscripts.org/scripts/show/32179

I've added links in the output of this script to link to the "playground" experimental features for artist aliases and "musical soulmates" (new neighbours) to allow you to find what other names the artists might be recording under and to see which listeners of the band might share some of your musical tastes.

Discussion
User script

The recent tracks charts were changed on the web site. The landmark play script has been updated to allow for this.

Script

The hide activity box script has been updated to handle English, French and German sites. I will try to get this done for all of the languages supported by the Profile Polisher, no guarantee as to when that will happen.

There are more "box"es supported now.

The change to the English version of Last.fm has spread to all of the other sites.

The profile polisher has been updated to ensure the script works even with this change.

See this announcement for details.

The format change today has resulted in 3 updates to the User Scripts files:
Profile Polisher (updated only for English version)
Landmark Tracks (the offset will be off, the track count should be fine)
Get TOM for users (worked, but the values weren't displayed)

There is an Opera user script available which allows you to sort your top artists by the total length of time of their songs that you've scrobbled. While it works with Greasemonkey, Greasemonkey users may prefer gadgetchannel's Greasemonkey script, as that is quicker.

Script info:
Forum thread
Script download