Hi there, yep, the lining difference is not out of the ordinary. Treesje previously used the silver bengaline (which has that striped appearance) lining in their bags prior to the release of most of the Fall 2009 bags, but they changed to the current black cotton twill lining after that. This thread should give you more of an idea of the timeline, as it was started when the first bags with the new lining were being released:
http://forum.purseblog.com/treesje/fall-2009-lining-change-thoughts-491019.html
All Fall 2009 bags (and bags from subsequent seasons) have the black cotton twill lining, except for the first batch of Fall '09 bags that was released before July. This first batch of Fall '09 bags has the older silver bengaline lining, and the bags that were released in the first batch include the regular and studded Metro collections (Asher, Mini Asher, Tristan, etc) and the Stone collection (Marley, Turner, Jovi etc).
The Red Jovi was one of the Fall '09 colours. Since the Fall '09 Jovis were amongst the first batch of Fall '09 bags to be released, it
should therefore come with the silver bengaline lining. However, if I'm not mistaken, Treesje did a second production run of some of the Fall '09 colours of the Jovi (e.g. Turquoise, Black) in late 2009 or so, and the second production run has got the black cotton twill lining. I don't know whether Treesje produced
all the original Fall '09 colours of the Jovi in their second production run, though, so I'm not certain whether the Red Jovi was also part of the second production run and therefore whether some Red Jovis would have the black cotton twill lining as well. What lining does your Red Jovi have?
As for your Avril Lavigne question, it depends on when those pics were taken! I'd say anything from August (maybe September) '09 and before would likely be the first run Jovi, and therefore would have the silver bengaline lining. Anything closer to end '09 or so, and it could be from the second production run of the Jovis, and therefore would have the black cotton twill lining. (And if the Red Jovi wasn't produced in the second production run, that also simplifies things!
)
HTH! I'm a Jovi owner too, so I hope you're enjoying yours!