J'utilise Thunderbird 3.1.9 sous Debian Squeeze et la console d'erreur me retourne les messages (d'erreur

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2011-04-05 17:39:03 gloda.index_msg ERROR Problem entering folder: ccm, skipping. Error was: undefined:651: [Exception... "Component returned failure code: 0x80550006 [nsIMsgFolder.msgDatabase]" nsresult: "0x80550006 (<unknown>)" location: "JS frame :: file:///opt/thunderbird/modules/gloda/index_msg.js :: gloda_index_indexerEnterFolder :: line 651" data: no]
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2011-04-05 17:39:03 gloda.indexer WARN Problem during [job:folder id:67 items:0 offset:0 goal:null], bailing. Problem was at undefined:651: [Exception... "Component returned failure code: 0x80550006 [nsIMsgFolder.msgDatabase]" nsresult: "0x80550006 (<unknown>)" location: "JS frame :: file:///opt/thunderbird/modules/gloda/index_msg.js :: gloda_index_indexerEnterFolder :: line 651" data: no]
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2011-04-05 17:39:03 gloda.index_msg ERROR Problem entering folder: qpuc, skipping. Error was: undefined:651: [Exception... "Component returned failure code: 0x80550006 [nsIMsgFolder.msgDatabase]" nsresult: "0x80550006 (<unknown>)" location: "JS frame :: file:///opt/thunderbird/modules/gloda/index_msg.js :: gloda_index_indexerEnterFolder :: line 651" data: no]
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2011-04-05 17:39:03 gloda.indexer WARN Problem during [job:folder id:115 items:0 offset:0 goal:null], bailing. Problem was at undefined:651: [Exception... "Component returned failure code: 0x80550006 [nsIMsgFolder.msgDatabase]" nsresult: "0x80550006 (<unknown>)" location: "JS frame :: file:///opt/thunderbird/modules/gloda/index_msg.js :: gloda_index_indexerEnterFolder :: line 651" data: no]
Quelqu'un aurait-il une idée de ce que signifient ces erreurs et de comment les résoudre ?
Merci pour votre aide
