System: Windows XP SP2. Mozilla Firefox 2.0.0.8. Flash v8.
Pandora creates the "plugtmp" (plugtmp-1, plugtmp-2, etc.) folder inside the "C:Documents and settings<Account>Local settingsTemp" directory.
Then it downloads the music and names it for example "8968701340778595214" (without any extension).
Howewer, some files (the "missing-files") are being downloaded directly into the Temp directory (i.e. outside the plugtmp folder).
These files are named accordingly to the pattern: "plugtmp" + "-1" ("-2", "-3", etc.).
When the temp folder's name is "plugtmp-1" the first part of the "missing-files" name has the same name (and these missing files are named: plugtmp-1-1, plugtmp-1-2, etc.)