Web Usage page stops displaying results

[rfdude]

After a few days of use, Web Usage page no longer displays visited web sites and Google searches beneath the headings. Gargoyle reboot brings it back. No loss of data, usage or quota tracking.

V1.3.3
Asus W500G P1 (32 Mb of RAM)
Memory Usage 56.8% of 29.8MB. After REBOOT it is 46.4%
about 200 to 900 Mb traffic per day
Number of sites to save: 400
Number of Searches to Save: 300
Monitor All Hosts
Overview indicates 6 days uptime since last reboot
QoS is disabled.
Quota is enforced per host and for All traffic.
Block access to sites with PORN in domain.
170 hour DHCP lease.
This is at an RV camp.

The only obvious metric is the memory usage is above ~55% when Web Usage stops working. Lease table was long (forgot to count it).

[rfdude]

Interestingly, this issue persists with v1.3.5. Uptime has been 4 days and memory usage over 55%.

I'm guessing without anyone else experiencing this, it must be limited to my Asus WL-500gP v1?