Ubiquity memory issues on Firefox

I may have to stop using Ubiquity for a while. I’ve used it exclusively because it, plus the share-on-delicious script, provides a great keyboard-only way to tag web pages for Delicious, simply by ctrl-space and typing share Delicious bookmark description tagged delicious tags entitled title“.

Alas, there are definite memory issues with Ubiquity or with the script. I currently have three tabs open in Firefox and the memory is more or less stable at 112,988K. If I invoke Ubiquity and start typing:

share This is a sample Delicious post that's not too different from one I would normally do, except a bit shorter and more fictional. tagged ubiquity entitled foo ubiquity test.

then suddenly memory usage spikes up to 571,028K !!! The memory use gradually falls back down, but it climbs steadily and precipitously while I’m typing, and there’s a point beyond which Firefox becomes unusable. Maybe I’m a canary user because I’m a touch typist, and I’m typing faster than Firefox can garbage collect memory? I still can’t believe that Ubiquity could be consuming so much, though.

(Update: apparently I’m not alone.)