OK, now it's doing it every time I update the file.
Said file:
.calendar_table
width: 100%
th.days
width: 14%
td.days
vertical-align: top
.three-columns
box-sizing: border-box
vertical-align: top
width: 32%
margin: 0 .5%
display: inline-block
header .weekly
text-align: center
.weeklist
td
text-align: center
height: 49px
width: 7%
font-size: large
padding: 0 7px
td.weekdays
width: 100%
padding: 4px
text-align: left
vertical-align: middle
div.day
font-size: .9em
text-align: left
.event
color: #078907
.holiday
color: #000080
.chk
display: inline
float: left
width: 24%
padding: 3pxPosted: November 15th, 2012, 04:25 AM
OK, so I figured out what the root cause it, though I have no idea how it manifests it this way. If you call add_plugin_css_file with a file that doesn't exist, it sort of chokes on it silently up until this point.
Basically, I'd managed to put add_plugin_css_file('Wedgeward:Calendar', 'calendar.css', true); because I'd forgotten about not needing extensions there.