Firefox Bug Warning Error

I'll do this, instead, which might be more informative (near-duplicate lines reduced):

[2009-09-15 09:06:58] ------ Xmarks/3.3.3 (/Places) starting sync with sync.xmarks.com ------
[2009-09-15 09:06:58] Using Baseline Cache.
[2009-09-15 09:06:58] >>> POST https://sync.xmarks.com/sync/bookmark...
[2009-09-15 09:06:58] >>> Body is: {"baserev":849,"retry":2,"log":{"mid":"fox2un5t","serp":3,"ssEnabled":true},"view":4}
[2009-09-15 09:07:00] >>> Callback ({username:"BravoDeltaHotel", endrev:851, commands:[{action:"insert", args:{pnid:"ROOT", ... a bunch of changes...
[2009-09-15 09:07:00] >>> Finished mcs: ({set:[{action:"insert", nid:"rjC.U2", args:{ntype:"folder", name:"Bookmarks bar", ... a bunch of changes...
[2009-09-15 09:07:01] Updating Null field: description
[2009-09-15 09:07:01] Updating Null field: description
... a bunch just like this...
[2009-09-15 09:07:01] Updating Null field: description
[2009-09-15 09:07:01] Updating Null field: description
[2009-09-15 09:07:01] Yikes! Length was 1173 but is now 686
[2009-09-15 09:07:13] ClobberDialog: retval.okay is true
[2009-09-15 09:07:13] lcs = 136 scs = 1204
[2009-09-15 09:07:13] >>> Sync: Executing transit(server) on ({action:"insert", nid:"fzlabxmm-3", args:{ntype:"folder", pnid:"ROOT", name:"Unsorted Bookmarks", created:1214782882, modified:1252941114, bnid:null}}) vs. ({action:"insert", nid:"9AC.U2", args:{ntype:"folder", name:"Read It Later", created:1241102444, modified:1241102663, pnid:"ROOT", bnid:null}})
[2009-09-15 09:07:13] >>> Sync: Executing transit(server) on ({action:"insert", nid:"fzlabxmm-3", args:{ntype:"folder", pnid:"ROOT", name:"Unsorted Bookmarks", created:1214782882, modified:1252941114, bnid:null}}) vs. ({action:"insert", nid:"oBC.U2", args:{ntype:"folder", name:"searches", created:1241617888, modified:1241618407, pnid:"ROOT", bnid:null}})
... a bunch just like this...
[2009-09-15 09:07:13] >>> Sync: Executing transit(server) on ({action:"insert", nid:"fzlabxmm-3", args:{ntype:"folder", pnid:"ROOT", name:"Unsorted Bookmarks", created:1214782882, modified:1252941114, bnid:null}}) vs. ({action:"insert", nid:"IBC.U2", args:{ntype:"folder", name:"Unsorted Bookmarks", created:1214782882, modified:1238265236, pnid:"ROOT", bnid:null}})
[2009-09-15 09:07:13] >>> Sync: Executing transit(server) on ({action:"insert", nid:"fzlabxmm-3", args:{ntype:"folder", pnid:"ROOT", name:"Unsorted Bookmarks", created:1214782882, modified:1252941114, bnid:null}}) vs. ({action:"insert", nid:"KBC.U2", args:{ntype:"folder", name:"Unsorted Bookmarks", created:1214782882, modified:1252711088, pnid:"ROOT", bnid:null}})
[2009-09-15 09:07:13] >>> Sync: Executing delmoveout(server) on ({action:"move", nid:"J3sNU2", args:{pnid:"fzlabxmm-3", bnid:null}}) vs. ({action:"delete", nid:"I3sNU2", args:(void 0), deleted:["I3sNU2", "J3sNU2"]})
[2009-09-15 09:07:13] Synchronization failed. Error is (new Error("NearestAncestor failed accessing fzlabxmm-3", "chrome://foxmarks/content/foxmarks-core.js", 801))
[2009-09-15 09:07:13] Returned error: Synchronization error(4)
[2009-09-15 09:07:13] Will retry at Tue Sep 15 2009 10:07:23 GMT-0500 (Central Daylight Time) ( Delete or Edit for 15 minutes )

Well. That seems to've worked. I did a manual download, then re-deleted all the stuff I wanted to get rid of (I accidentally copied a folder of subfolders several times) and then told it to sync and told it "Yes, please sync". And it just worked. Weird.

Thanks! ( Delete or Edit for 15 minutes )