Just noticed this error when using the "Add New plugin" function from the admin panel where the popular plugin tags are suppose to be shown:
Warning: number_format() expects parameter 1 to be double, string given in /xxxxxx/xxxxx.xxx/html/wp-includes/functions.php on line 155
(x's added to mask my server info)
Also when I tried to bring up the info screen for a plugin needing updated (when you click on view details) that screen is completely blank except for a blue box in the upper right corner that says "FYI"
I have for separate installs running different plugins and I get the same error on all four