"Active Theme is Broken"

[ktoering]

Whoa...this has never happened.

I tried to change the banner image on my website www.langstonblackfilmfest.org and for some reason, the whole site is gone. Poof! Specifically, here is what I did:

1. Created a new logo with the exact same dimensions as the one I had on the site.
2. Using filezilla, I went to the folder called streamline30/styles/blue/images
3. renamed the original logo.png to logoold.png
4. ftp'd the new logo to the folder and renamed it logo.png

When I opened my site, there was nothing there, no 404, nothing.

I went back to my wp dashboard. When I went to appearances, I got this message:

Warning: array_keys() [function.array-keys]: The first argument should be an array in /home/vg000web02/91/36/7003691/web/wp-includes/theme.php on line 513

Warning: array_keys() [function.array-keys]: The first argument should be an array in /home/vg000web02/91/36/7003691/web/wp-includes/theme.php on line 513

Warning: uksort() [function.uksort]: The argument should be an array in /home/vg000web02/91/36/7003691/web/wp-admin/themes.php on line 73

Warning: array_slice() [function.array-slice]: The first argument should be an array in /home/vg000web02/91/36/7003691/web/wp-admin/themes.php on line 94

Manage ThemesInstall Themes

The active theme is broken. Reverting to the default theme.
Current Theme
by

All of this theme’s files are located in .
Available Themes

Warning: array_keys() [function.array-keys]: The first argument should be an array in /home/vg000web02/91/36/7003691/web/wp-admin/themes.php on line 150

Warning: natcasesort() [function.natcasesort]: The argument should be an array in /home/vg000web02/91/36/7003691/web/wp-admin/themes.php on line 151

How do I get my site back?
Do I need to re-install the streamline theme?
I am using a classic theme, does that matter?

Thanks,
Karen