Will upgrading to OSX Mountain Lion erase my rEFIT dual boot Windows?

Hi All,
At the suggestion of one of the users in a different section of the forum, I am posting my question here in hopes of finding someone who might have already done this upgrade and can speak from experience.
I have a MacBook Air that is currently setup to dual-boot OSX Lion or Windows 7 with Boot Camp. The Windows 7 was a requirement in order to be able to use my laptop for work. I want to upgrade to Mountain Lion but I also don't want to erase the partitioning on the hard-drive and I want to keep my Windows 7 installation intact. If I choose to upgrade (instead of a clean install) will this delete the Windows partition and wipe out my disk or will it retain my dual-boot option as it currently is?
Thanks for your help.

Then wait on update, and plan to (goes without saying hopefully) to have  backups of both that you can always restore. Especially as this is a work computer in essence.
Lion had trouble until 10.7.1 and the Lion 4.0 Windows Support Software itself was buggy for those that were installing Windows (or upgrade their boot camp drivers with Lion's).
Until people look at the Lion Recovery partition and whether that changed in size or something, or other changes to the partition tables.
WinClone 3 and CampTune can both help preserve your installation and Carbon Copy Cloner to make bootable backup of Lion and Lion Recovery, in addition to TimeMachine. (TimeMachine has been improved and more flexible).
And store your ML install package somewhere - given how slow it is DL'ing I'd wait days to even bother.

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