Is it no longer possible to update tags on posts in Blogger?

Because quite a lot of my blogposts are list-based I often update them with more recent information (eg the ones listed on the right including the science communication jobs pages and I'll be updating the one on open air cinemas when the venues publish their listings) and whenever I click the 'Publish' (or 'Update' button when it's an edited post) I get a warning sign as shown below.

The warning suggests that I have some illegal ampersands in my tags, which I don't. It is not possible to click 'ignore' and update anyway, the system just doesn't permit it. This means I have to remove the tags and put them in the body of the post, which is a ridiculous way to handle metadata.

I can't be the only one experiencing this? Or perhaps it's a browser thing. I'm using Chrome with Win 7 Starter eidtion at home if that helps (click on the Start button and type winver into the search box and it brings up info about your windows version).

The title of this post is a little misleading - I don't actually want to update the tags but the post. It's the tags which are causing a problem (as yet unidentified) with the process of updating the post itself.

There's a red banner at the top announcing a problem with the tags which are on the right hand side, I've had to remove them from this post and put them in the body.

While we're at it, I could do without the intrusive little 'Composition editor' announcementette popping up uninvited and making it harder to see what I'm typing. Other than that, very happy with Blogger, just very very confused that tagging is now a problem. I've added one tag to this post, let's hope it goes through.

Parking a comment here that I tried to add to another person's blog

This is a single-use only post :) It's the text of a blog comment I tried and failed to add to this blog http://yearsix.chorltonparkblogs.net/2009/11/25/digital-map-skills-and-our-lake-district-big-question/ but the verification system was having none of it. I've also noticed that when adding a blog post using Safari I can't create links within text...

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Nice concept - I think I should have a bit of a play with this sort of thing myself.

How about a map showing where essential services (pharmacists, shops with late opening times) or advice centres are located, with telephone number, website and opening hours information incorporated. For tourism, how about photos not just of the target destination but of the roads leading in to it, a bit like a stop-motion 'this is what it will look like if you travel from X to Y'.

I'd also like something that is, by design, permanently unfinished so that it is always being updated (perhaps by people uploading geotagged data from mobile phones etc). Is there scope to add audio information ('...and on your left you'll see..') to the location points?

I've enjoyed recording and sharing, via an iPhone app, routes of favourite walks and there's also the opportunity to download others'. The app I use (Geotagging) allows you to take photos en route, keyword tag and geotag them so that they're linked to the points along the journey, and visible to others.

Another nice use of mapping is by the Amazon Conservation Team who've done something that goes by the name "Participatory ethnographic mapping: mapping indigenous lands" creating, jointly with local people, "a "risk" map that identifies areas within the mapped region that either are currently threatened or are at greatest risk of harm from external actors."

Website here http://www.amazonteam.org/index.php/193/Participatory_Ethnographic_Mapping_Mapping_Indigenous_Lands or there's a video describing the project here http://www.youtube.com/watch?v=nxBb2FOj9x4