The alerts tab shows alerts generated by Burp's tools. This information may be useful to troubleshoot network connection or other problems.
If the same alert is generated more than once in succession, the alerts are consolidated into a single entry in the table, with a counter showing the number of times the alert was generated.
Get help from other users, at the Burp Suite User Forum:
This release fixes a problem affecting some users of 32-bit systems with the new handling of temporary files that was introduced in v1.6.08.