WHY IS JENKINS STILL IN LEFT?
It really is an interesting question. Especially when considering the following:
1) Jenkins is a very good outfielder.
2) Ben Grieve (likely RF for MIL) is a very bad outfielder
3) The Brewers plan on giving Brady Clark and Keith Ginter innings in RF

Notice I didn't mention Jenkins' arm strength in this. While it is certainly an advantage for a RF to have a strong arm, I think its a misconception to believe that is why a player is put in RF. The reason you put a talented defensive outfielder (or the better defensive OF of the two corner positions) in RF is to prevent singles from becoming doubles and doubles from becoming triples. There are very few triples hit to LF. It is true that a strong arm can prevent bases from being advanced, but in general an OF's ability to cut a ball off in the gap or make a good read on a ball will have a greater influence on how many bases are advanced as opposed to just pure arm strength.

I can address the statement that "RFs have strong arms" by explaining it this way: RFs are good defensively, so that is usually why they have good arms. It just goes with the package. Rarely will you see a player who is a mess in the outfield but has a cannon (although there are exceptions)...Typically you will see players like that in LF. Shannon Stewart is a guy that has an incredibly weak arm but plays RF because he is solid with the glove. With the Mets, Cliff Floyd had a better arm then Cedeno, but they kept Floyd in LF and Cedeno in RF.

I'm guessing that since Jenkins came up a LF and has established himself as one of the best defensive LFs in the game they don't want to mess with him now. Burnitz blocked him in RF when he came up, but Burnitz left after 2001 and since then the Brewers were filling RF with guys like Jeffrey Hammonds, John Vander Wal, Matt Stairs, Brady Clark, Izzy Alcantara, Jim Rushford, Jason Conti, and whoever else has played RF for the Brewers. Why not move him to RF before the 2002 season? In baseball, just like in life, people get labeled all the time. Maybe the Brewers just "think" Jenkins is a LF...Just like the White Sox labeled Chad Bradford as a "successful minor leaguer" that couldn't get hitters out in the big leagues for example.