In Splunk 4.1.x, both 'attempt' patterns are intended to work. There may be some outstanding issues with followTail, so you may want to evaluate what results you get without that.
You may want to try turning on some debug settings to get more insight, or work with Splunk Support.
In etc/log-local.cfg, you could turn these on.
category.TailingProcessor=DEBUG
category.WatchedFile=DEBUG
category.BatchReader=DEBUG
You can also turn them on/off interactively from Manager.
This might be of use:
http://www.splunk.com/wiki/Community:Troubleshooting_Monitor_Inputs#File_inputs
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