The problems are fixed in the 4.1RC2.

That's generally the reverse of what many people found.....RC1 broke the Flickr Publish service, and RC2 fixed it.

See this thread: http://feedback.photoshop.com/photoshop_family/topics/lr_4_1_rc_flickr _publishing_broken

I think that there are two problems here. In LR4 Flickr publishing was broken in that you could not update an existing stream. The workaround was to delete the publish service and create a new one. Then publishing worked correctly ... until RC2 came along that is. If you created a new publish service in LR4 you can't update with RC2. This behaviour has been noted in other forums. E.G. http://feedback.photoshop.com/photoshop_family/topics/cant_update_this _collection_semi_colon_expected

I really don't want to have to delete my Flickr Service and recreate it another time as it really messes up my Flickr account comments, favourites and stats.

@Peter_McC: my point was that the problem that RC1 introduced was fixed in RC2, so the OP should be OK in going to RC2 if he hasn't yet hit a problem in RC1. I didn't know that some of you who developed a workaround for the RC1 problem are now having trouble in RC2. Guess I was one of the fortunate ones who didn't bother with trying a workaround, so everything now works OK in RC2 for me, and it should do for the OP.

An update ...

I have discovered that RC2 publishing does seem to be working (for me) but Flickr or LR seems to be objecting ("Invalid at the top level of the document") to specific images possibly relating to the contents of the caption field.

I narrowed down the failure to just one image ... removed its caption... it published, I put the caption back on - "Invalid ..." error came back.

FYI and not sure if relevant - I sometimes put http links in my caption fields.

I would have come back with a more comprehensive test, but it now appears that LR will not communicate with Flickr at all, now saying it cannot contact the Flickr service, so I cannot investigate further yet.

I know a little off the wall here ... but is it conceivable that Flickr itself has locked me out due to "erroneous" or suspicious content?     I have never had problems with LR talking to Flickr before today and publishing to SmugMug is still working fine.  

Just curious Peter ... are you finding this message specific to only one of your collections... ie if you republish a photo in another collection does it strangely work?

Also I am becomming more convinced about the document error relating to Http links or other complexities in the caption.

OK. I can confirm that the return (produced by Shift-Return) in the caption was the culprit.

Peter ...

Just thought I'd add that I'm no expert here, and it could be multiple problems and or some Flickr service issues at their end.

The error messages are definitely not helpful though.

I'm still investigating and will report anything else I find... but I'm glad you've had some sucess.

Nice shots by the way ... I'll have a better browse later.

I just installed the new 4.1 release yesterday.  I had previously installed 4.1 RC 1, which broke my existing Flickr setup and recreating it resolved that issue.  I never installed RC 2.  I just tried to publish to Flickr with the final 4.1 release and I am now getting an error "a semi colon character was expected".  The old Flickr setup still does not work at all.  Has anybody had the same issue and worked around it?  I am finding nothing thus far poking around looking for an answer.

I have apparently resolved the issue by going to the original Flickr setup I had, which I never deleted and did a reauthorize and now that setup is working again.

My experience is that it has not solved the carriage return problem. I am running 4.1 and got the flickr publish to work again by reauthorising my RC1 Flickr service. It still doesn't like carriage returns and furthermore it appears that multiple spaces in the caption also cause the same error.

I haven't done much testing with this but I had to eliminate some instances of multiple spaces to get the publish to complete.

Peter

I don't see the option to Remove Authorization in Lightroom 3.6. I added another Flickr publishing service and authorized it, same issue with "could not connect". I tried uploading a set of 8 pix, no metadata whatever.