New mac air running hot!  Anyone having same problem?

I downloaded Lion last night on my Mac Book Air (purchased Feb of this year).  The fan would hardly run before as computer would rarely get hot.  Now it is running constantly since download.  Anyone else having similar issue?  Is there a solution to this?

I had the same problem Mac late 2010, 2.13 Intel core duo 4GB RAM 2
Lion was installed as update.
as result:
CPU on 80 °C and to keep it between 70 and 80 °C fan had to work on 6500 RPM.
I used Istat.
repaired permissions, no result, reset the SMC and so on... no results.
lately reading also other posts, I started to disable 1 by 1 the start up items.
the antivirus Sophos +  the time machine auto back up -on off was quite successful
now I have a 4000 RPM = quite decent as noise level and CPU at 40-47 °C.
had nothing to do with the flash or browsing, and so on.
Spotlight, yess is pushing the temp up, but is not running 24/7
Check your startup items, the answer can be there
Maybe helps
Good luck!
Lucian

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