If IceTV sends a timer a that is further in the future than the current end of the EPG data, the timer on the Beyonwiz will not have a description (usually the episode name) for the show, because that information is extracted from the EPG. This is usually seen on timers for ABC and SBS.
If the PVR is never rebooted (or has a GUI restart), that description won't get updated. Even if it is rebooted or a GUI restart is done, the descriptions are updated from the EPG when the timer list is read from file, but this happens before the EPG is updated, so some of the descriptions that could be filled aren't. A second reboot/EPG restart should fix up the remaining descriptions that can be fixed, since now the cached EPG will be up to date.
This issue is most visible on Beyonwiz T series PVRs that are normally in standby, rather than shut down, when not in use.
I am currently testing code that should fix this problem, by scanning each EPG update sent from the IceTV server and using the new information in the EPG update to update any timers with missing or outdated description information. Initial testing shows that this will have a minimal impact on the speed of an IceTV update.
If you want to look at the detailed discussion of the fix (including indicative timings of the potential performance "hit" from the fix), see
Long Range IceTV Timers on the Beyonwiz forum.