[BeckyEbook]

I hope it will be useful to someone, so please don't hit me.

Easy quick and dirty fix for many plugins that use functions from common_utils.py). Of course, the following advice only makes sense for beta users before the plugin maintainers release new versions.

1. Edit file common_utils.py
2. Remove (twice) QRegExpValidator, QRegExp from imports
3. Delete this fragment* (if it exists):

Spoiler:

class NumericLineEdit(QLineEdit):
    '''
    Allows a numeric value up to two decimal places, or an integer
    '''
    def __init__(self, *args):
        QLineEdit.__init__(self, *args)
        self.setValidator(QRegExpValidator(QRegExp(r'(^\d*\.[\d]{1,2}$)|(^[1-9]\d*[\.]$)'), self))

[*] I haven't found a single plugin that uses this code, so it won't be a big deal.

In this way, I managed to modify about 90% of the plugins that I use and now work normally in the beta version.

The remaining plugins require minor or major changes, especially if they are to be backward compatible with previous versions of Calibre.