Charging clients for Software failure?

The accounts software which I use, Absolute Accounts, has a few issues with layout problems. One in particular has meant the layout of my accounts looks poor. The advice given by support is to manually edit it as they don't plan on changing it yet. This is fine if you only do one edit; however, the client has come back on two occasions requesting minor revisions. Therefore a couple of sets of drafts adds an extra half hour on to the time as I have to make the manual adjustments.

So the question really is that is it fair that I charge the client for an extra half hour or so of time for failings within my software that I have purchased. Or should I be bugging the software company more to get the issue fixed.

I have had other clients where I have had to make some manual edits and not felt it fair to charge them. 

The issue itself relates to fixed assets being written down to nil. The Balance sheet shows a Fixed Assets caption, but no note number or dashes under the column to show it as a £nil balance. It looks awful so I have to manually edit. The actual fixed asset note is included.