Can't add holidays with ' in the title

[Freddie Bingham]

Around line 838 in admincalendar.php change this:
varname IN ('holiday_title_$holidayinfo[varname]', 'holiday_event_$holidayinfo[varname]')to
varname IN ('holiday_title_" . addslashes($holidayinfo['varname']) . "', 'holiday_event_" . addslashes($holidayinfo['varname']) . "')

[Stadler]

Where can I find the file?

never mind ... got it: admincp/admincalendar.php

[Babylon]

Around line 838 in admincalendar.php change this:
varname IN ('holiday_title_$holidayinfo[varname]', 'holiday_event_$holidayinfo[varname]')to
varname IN ('holiday_title_" . addslashes($holidayinfo['varname']) . "', 'holiday_event_" . addslashes($holidayinfo['varname']) . "')

I got the same problem when then trying to delete a holiday with a ' .
if anyone else has this same problem, applying the same code changes on line 914 seems to sort the problem :)