In 2.62, first when you try to import, in the name field, instead of *.obj it contains the name of the currently open file. That's one issue.
Then, if I try the import into a fresh scene, I get the above error.

Blender 2.62, 32-bit, running in Ubuntu.

Did you use the official blender 2.62? If you used any newer than the official (e.g. one from graphicall.org or so), importing UVs will not work. They do not not work for any format, not only with obj.

Um, not sure. On the splash screen it says:

2.62.0
r44224

I got this via ppa:

http://ppa.launchpad.net/cheleb/blender-svn/ubuntu oneiric main
http://ppa.launchpad.net/cheleb/blender-svn/ubuntu oneiric main (Source Code)

Should be good?

I am not familiar with this launchpad thing, but it looks like that it is too new. The version from blender.org has version2.62.0/44136 (lower number than yours) and also the launchpad version has "blender-svn" in the name, which looks like it is a newer version which might have already the bmesh branch in it. I tried with the blender from subversion and got exactly your error message, so you most likely use a version that is too new to import files with UV-coordinates.

You are using a Linux version? I have no issues with 2.62 on Windows - so far.

No issue as well on Windows 7 64 bit.

I also have no issues on Win XP Pro or Win Vista. Have you tried downloading and using 2.62 from Blender.org to see if it will import properly?

Quote - I also have no issues on Win XP Pro or Win Vista. Have you tried downloading and using 2.62 from Blender.org to see if it will import properly?

I'll try that and see if that will fix it. Thanks.

No Linux Blender users??? :blink:

Well I for one am using Windows 7 64 bit and have hit the same errors on imports.  Though that's why I kept my older version around to do the imports.  :)

Quote - No Linux Blender users??? :blink:

I'm using the x86-32 version from the Blender.org.  It works!

http://www.blender.org/dl/http://download.blender.org/release/Blender2.62/blender-2.62-linux-glibc27-i686.tar.bz2

I'm not at my regular PC atm, Amy - on holidays on the Big Island of Hawaii!!, so I'm typing on a netbook running Ubuntu (no mouse, tho :bored: ) - but when I get back I'll be sure to install that version and run it. I find it curious that the dev version would lack that functionality. Or, put another way, a version available via ppa wouldn't be fully functional.

Sorry, I'm just now getting to this.  I'm not having any problem importing and exporting obj files with Blender 2.62 on Ubuntu, but it's the official download from the Blender site and not from a ppa.  I like to keep several versions on hand for choice and testing.  2.62 actually works great for me, but I haven't taken the time to add some of my key plugins to it, so it's nice to have around my 2.58, too.  That said, I'm getting addicted to the new UV mapping features, like the subsurf aware mapping and straightening.  The new "seams from islands" and UV sculpting feature is tempting me to try remapping Antonia to take V4's textures.   I was kind of annoyed at seeming to lose Join as UVs (copies UV mapping to an identical mesh, which is more useful to me than it should be), but it had just moved. 

I've downloaded the official release (32-bit) of Blender for Linux 2.62 and installed it on this little netbook and it imports obj files just fine. So, it was the ppa-installed version in which importing obj files was defective. Curious as to why that would be - must be the development version (bleeding edge) wouldn't have all the stuff that a full release version would have.

I think it would be cool to do a remap of Antonia 1.2 to take V4 textures, KobaltKween! Wonder how hard that is to do. David said something about just pushing 'verts' around or something.

Bleeding edge is just unfinished.  It generally has all the features of previous versions, but bugs get introduced by changes.  It can be worth it to brave bugs in order to try out specific new features, but then you sacrifice stability.  That's why I have different versions.  So I can try new features without sacrificing the stability of the main version.

I'm not sure how hard it is yet, but as far as I can tell the general task involves to duplicating the seams of mesh a on mesh b as closely as possible, doing a new unwrap on mesh b, then adjusting the UV map b to fit UV map a. That second part is where it's hard to keep distortion low while getting everything to stay in the right place.  

I think that DPH had to push a lot of UV vertices around individually.  Blender has a lot of features I'm hoping will help with that process.  Like pinning, live unwrapping, and minimizing stretch.  The new UV sculpting gives even more general control than proportional editing, along with an equivalent of smoothing.  And the islands to seams feature will make it easier to see V4's seams clearly.  So I think remapping is easier than it was.  Which isn't to say it won't still be hard, just not as hard as it was.