some (probably all) browsers have an option to set a minimum font size for web-pages. I suspect this setting has been set/changed in your case. try another browser, try re-installing, or better yet check how to change this setting in your specific browser.
for example, in safari 5 on a mac, the setting is found in: preferences -> advanced -> universal access -> never use font sizes smaller than:____ in chrome, go to settings: "under the hood" -> web content -> customize fonts -> minimum font size regards, axs -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To post to this group, send email to tiddlywiki@googlegroups.com. To unsubscribe from this group, send email to tiddlywiki+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/tiddlywiki?hl=en.